SympifyApps
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Free online tools catalog

Find a free online tool for your task

Search browser tools and focused web apps for PDFs, images, text, code, calculators, dates, planning, and collaboration. Describe the outcome in your own words or browse by category.

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SympifyApps

Split

Groups & organization

Divide shared costs and keep a clear group balance through one link, with no account required.

  • Quick to start
  • Easy to share
  • Clear for everyone
Open application

SympifyApps

Queue

Groups & organization

Create a queue, let visitors join by QR code or link, and manage the line from a separate private link — no accounts required.

  • No sign-up
  • QR code or link
  • Private organizer controls
Open Queue

SympifyApps

Borrow

Groups & organization

Label shared items with a QR code so trusted groups can see who has each item and record every return in one clear history.

  • One QR per item
  • Clear checkout history
  • No sign-up
Open Borrow

SympifyApps

Roster

Groups & organization

Create a shared sign-up sheet with limited spots, then let people choose and update their own places through private links.

  • No accounts
  • Automatic capacity limits
  • Private edit links
Open Roster

SympifyApps

Wishlist

Groups & organization

Share gift ideas, prevent duplicate presents, and coordinate group gifts through one simple link.

  • No accounts
  • Private reservations
  • Group gift support
Open Wishlist

SympifyApps

Poll

Groups & organization

Ask one clear question, share one link, and collect anonymous group votes without accounts or app installs.

  • No participant names
  • No accounts
  • Private vote receipt
Open Poll

SympifyApps

Grocery

Home & hobbies

Keep one household shopping list up to date through a private link, with fast item entry and clear bought state.

  • Shared live list
  • No accounts
  • Private collaboration link
Open Grocery

SympifyApps

Chores

Home & hobbies

Give each household chore its own fair rotation, due date, and visible next person through one private shared board.

  • Independent chore rotations
  • No accounts
  • Private shared link
Open Chores

SympifyApps

Carpool

Groups & organization

Coordinate drivers, passenger seats, return rides, and unmatched requests for one event through a private group board.

  • Live seat availability
  • No accounts
  • Private group link
Open Carpool

SympifyApps

Boxes

Home & hobbies

Find what you packed without opening every box: keep a searchable inventory and print private QR labels.

  • Searchable inventory
  • View-only QR labels
  • No accounts
Open Boxes

SympifyApps

Rooms

Groups & organization

Assign guests to rooms, enforce real capacity, and share one private read-only room plan.

  • Clear room assignments
  • Capacity checks
  • No accounts
Open Rooms

SympifyApps

TimeVote

Groups & organization

Choose an exact meeting time with Available, If needed, and Unavailable answers — without accounts or calendar access.

  • Explicit availability
  • Time-zone aware
  • No accounts
Open TimeVote

SympifyApps

GiftDraw

Groups & organization

Run a private Secret Santa draw with personal reveal links and optional mutual exclusions — without accounts or email.

  • Personal reveal links
  • Mutual exclusions
  • No accounts
Open GiftDraw

SympifyApps

MeterBook

Home & hobbies

Keep exact electricity, gas, water, and other meter readings in one private chronological log with QR access.

  • Exact reading history
  • QR code and copy together
  • No accounts
Open MeterBook

SympifyApps

HelpHours

Groups & organization

Collect self-reported volunteer time and count only the entries your group accepts into its private internal total.

  • Reviewable entry history
  • QR code and copy together
  • No accounts
Open HelpHours

SympifyApps

ArriveList

Groups & organization

Check guests in from one shared private list on several phones, with no accounts or ticketing workflow.

  • One live guest list
  • Staff link and QR together
  • No accounts
Open ArriveList

SympifyApps

PaintLog

Home & hobbies

Keep the exact brand, color code, and finish used on each surface in one private room-by-room record.

  • Current and earlier coats
  • Separate read-only link
  • No accounts
Open PaintLog

SympifyApps

SizeSheet

Groups & organization

Collect one vendor-provided apparel size from each participant and receive an order-ready count without accounts or a spreadsheet.

  • One private response link
  • Private correction receipt
  • No accounts
Open SizeSheet

SympifyApps

PairRounds

Groups & organization

Create several one-to-one activity rounds without repeated partners and share the live current round with a trusted adult group.

  • No repeated pairs
  • One private live board
  • No accounts
Open PairRounds

SympifyApps

TimeThere

Time & productivity

Compare the current or chosen local time across any two IANA zones using the server clock and daylight-saving rules.

  • Any supported IANA zone
  • Server-authoritative time
  • No accounts
Open TimeThere

SympifyApps

DayCount

Time & productivity

Find the exact gap between dates or add, subtract, and count business days without a spreadsheet.

  • Exact calendar arithmetic
  • Business-day mode
  • No accounts
Open DayCount

SympifyApps

WorkHours

Time & productivity

Add up one to seven work shifts with unpaid breaks, including shifts that finish after midnight.

  • Exact shift totals
  • Overnight shifts
  • No accounts
Open WorkHours

SympifyApps

FuelCost

Calculators

Estimate fuel needed and trip cost from distance, efficiency, and price in metric, US, or UK units.

  • Metric, US, and UK units
  • One-way or return
  • No accounts
Open FuelCost

SympifyApps

AspectFit

Design & media

Reduce an aspect ratio and calculate a matching width or height with explicit rounding.

  • Exact reduced ratio
  • Matching target dimension
  • No accounts
Open AspectFit

SympifyApps

UnitPrice

Calculators

Compare two to four compatible packages by normalized unit price, including multipacks.

  • Lowest entered unit price
  • Multipack support
  • No accounts
Open UnitPrice

SympifyApps

PaperSize

Design & media

Look up ISO A-series and North American paper dimensions, then calculate whole-pixel sizes at a chosen PPI.

  • Published paper dimensions
  • Pixels for your chosen PPI
  • No accounts
Open PaperSize

SympifyApps

RecipeScale

Home & hobbies

Scale ingredient quantities from a recipe's original servings to the number you need, with exact fractions kept visible.

  • Exact serving ratio
  • Fractions stay precise
  • No accounts
Open RecipeScale

SympifyApps

LumberCalc

Home & hobbies

Add boards and total their board feet, cubic volume, and optional quoted cost using exactly the dimensions you enter.

  • Entered dimensions stay explicit
  • Per-board and total volume
  • No accounts
Open LumberCalc

SympifyApps

TileCalc

Home & hobbies

Turn your surface and tile dimensions into whole tiles, an optional extra allowance, full boxes, and cost — entirely in your browser.

  • Multiple surfaces or a known area
  • Your extra allowance stays explicit
  • No accounts
Open TileCalc

SympifyApps

PaintCalc

Home & hobbies

Estimate paint volume, whole containers, and optional cost from your surfaces, openings, coats, and the coverage stated on the paint label.

  • Surfaces and openings stay visible
  • Uses your label coverage
  • No accounts
Open PaintCalc

SympifyApps

ConcreteCalc

Home & hobbies

Estimate concrete volume, whole bags, and optional cost from your dimensions, explicit extra percentage, and the yield printed on the mix label.

  • Rectangular and round volumes
  • Uses your label yield
  • No accounts
Open ConcreteCalc

SympifyApps

DownloadTime

Calculators

Estimate an ideal download duration or the sustained speed needed from explicit file-size and transfer-rate units — entirely in your browser.

  • Bits, bytes, GB, and GiB stay distinct
  • Exact formula and normalized rate
  • No accounts
Open DownloadTime

SympifyApps

FractionCalc

Calculators

Calculate, simplify, compare, and convert fractions with exact results and clear intermediate steps — entirely in your browser.

  • Exact fraction and mixed-number results
  • Clear calculation steps
  • No accounts
Open FractionCalc

SympifyApps

PaceCalc

Calculators

Turn distance and elapsed time into pace, speed, finish time, and even splits — entirely in your browser.

  • Kilometres and miles stay explicit
  • Clear even-split table
  • No accounts
Open PaceCalc

SympifyApps

DrywallCalc

Home & hobbies

Estimate whole drywall sheets and optional cost from your walls, ceiling, sheet size, and explicit extra allowance.

  • Walls and ceilings stay visible
  • Sheet size and allowance stay explicit
  • No accounts
Open DrywallCalc

SympifyApps

GradeCalc

Calculators

Calculate weighted grades, current averages, and the score needed on a final exam with every contribution visible.

  • Exact percentage arithmetic
  • Weights and formulas stay visible
  • No accounts
Open GradeCalc

SympifyApps

EnergyCost

Calculators

Estimate an appliance's energy use and running cost from power or known kWh, usage time, quantity, and your electricity rate — entirely in your browser.

  • Exact decimal energy arithmetic
  • Usage and rate stay explicit
  • No accounts
Open EnergyCost

SympifyApps

SubnetCalc

Developer tools

Calculate an IPv4 subnet from an address and CIDR prefix or mask, inspect network and usable boundaries, or find a prefix for a host count — entirely in your browser.

  • Exact 32-bit IPv4 arithmetic
  • Network and usable boundaries visible
  • No accounts
Open SubnetCalc

SympifyApps

CheckDigit

Developer tools

Generate or validate GS1 Mod-10 check digits for supported GTIN, EAN, UPC, and SSCC identifiers — entirely in your browser.

  • Generate the exact final digit
  • Validate complete identifiers
  • No accounts
Open CheckDigit

SympifyApps

ChmodCalc

Developer tools

Convert Unix permissions between octal and symbolic notation, inspect owner, group, others, and special bits — entirely in your browser.

  • Exact octal and symbolic conversion
  • Setuid, setgid, and sticky bits visible
  • No accounts
Open ChmodCalc

SympifyApps

NumberBase

Calculators

Convert exact integers among binary, octal, decimal, hexadecimal, and base 36 — entirely in your browser.

  • Convert among bases 2 through 36
  • Exact integers, including negatives
  • No accounts
Open NumberBase

SympifyApps

PercentCalc

Calculators

Calculate a percentage of a number, percentage change, adjusted or original values, and percentage difference with exact formulas in your browser.

  • Six focused percentage modes
  • Exact decimal arithmetic and visible formulas
  • No accounts
Open PercentCalc

SympifyApps

DiscountCalc

Calculators

Calculate sale prices, coupons, stacked discounts, original prices, discount rates, and tax after a discount with exact arithmetic in your browser.

  • Six focused discount modes
  • Exact decimal arithmetic and visible breakdowns
  • No accounts
Open DiscountCalc

SympifyApps

MarginCalc

Calculators

Calculate gross profit, margin, markup, selling price, allowable cost, and rate conversion with exact browser-local arithmetic.

  • Five focused pricing relationships
  • Exact decimal arithmetic and visible denominators
  • No accounts
Open MarginCalc

SympifyApps

AreaCalc

Calculators

Calculate and convert the area of eight common flat shapes with exact rational arithmetic and honest π approximations.

  • Eight focused shape formulas
  • Exact unit factors and visible formulas
  • No accounts
Open AreaCalc

SympifyApps

VolumeCalc

Calculators

Calculate and convert the volume of eight ideal solids with exact cubic factors and honest π approximations.

  • Eight focused solid formulas
  • Exact cubic factors and visible formulas
  • No accounts
Open VolumeCalc

SympifyApps

DensityCalc

Calculators

Calculate density, mass, or volume with exact unit conversion and a visible formula, entirely in the browser.

  • Density, mass, and volume modes
  • Exact unit factors and visible cancellation
  • No accounts
Open DensityCalc

SympifyApps

SlopeCalc

Calculators

Convert geometric slope across rise and horizontal run, percent, per mille, degrees, and 1:N ratio in the browser.

  • Six focused slope modes
  • Exact linear math, honest angle approximations
  • No accounts
Open SlopeCalc

SympifyApps

SourceTally

Developer tools

Count physical lines, files and text bytes in a local project or public GitHub repository without uploading source to SympifyApps.

  • Local folder and public GitHub modes
  • Visible progress, exclusions and aggregate tables
  • No accounts
Open SourceTally

SympifyApps

DpiCalc

Design & media

Convert image pixels, physical print size and effective PPI locally with exact inch and metric factors and no image upload.

  • Three two-knowns, one-unknown modes
  • Exact units and explicit whole-pixel rounding
  • No accounts
Open DpiCalc

SympifyApps

TempoCalc

Time & productivity

Convert BPM into straight, dotted and triplet note durations, delay time and hertz with exact local arithmetic.

  • BPM-to-timing and timing-to-BPM modes
  • Exact fractions and a complete note table
  • No accounts
Open TempoCalc

SympifyApps

AudioSize

Design & media

Calculate exact uncompressed PCM payload size or recording time from sample rate, stored bit depth, channels and storage.

  • Duration-to-size and storage-to-time modes
  • Exact frame arithmetic with GB and GiB kept distinct
  • No accounts or uploads
Open AudioSize

SympifyApps

ScreenPPI

Design & media

Calculate screen PPI, pixels per centimeter, pixel pitch and physical dimensions from native resolution and visible diagonal.

  • Five focused screen-geometry calculators
  • Exact unit conversion with explicit rounding
  • No accounts or device scan
Open ScreenPPI

SympifyApps

SetStats

Calculators

Paste a number list and calculate count, sum, mean, median, every mode, minimum, maximum and range locally.

  • Five focused descriptive-statistics routes
  • Exact decimal arithmetic with an auditable sorted list
  • No account, upload or saved values
Open SetStats

SympifyApps

ListClean

Text & data

Clean pasted lists locally: trim edges, remove blank and duplicate lines, sort naturally or reverse, then copy the output.

  • Five focused list-cleaning routes
  • Fixed pipeline with reconciled removal counts
  • No account, upload or saved text
Open ListClean

SympifyApps

JSONClear

Text & data

Validate, pretty-print or minify strict JSON locally while preserving large numbers, decimals, escapes and member order.

  • Five focused strict-JSON routes
  • Lossless scalar tokens with line and column errors
  • No account, upload or saved payload
Open JSONClear

SympifyApps

TextDiff

Text & data

Compare two texts locally with deterministic line changes, optional case and whitespace rules, and a copyable review diff.

  • Five focused text-comparison routes
  • Deterministic line matching with explicit counts
  • No account, upload or saved text
Open TextDiff

SympifyApps

ContrastCheck

Design & media

Calculate one opaque sRGB color pair locally with the exact WCAG 2.x ratio, AA and AAA text references, and a non-text reference.

  • Five focused color-contrast routes
  • Raw-ratio decisions with conservative display
  • No account, upload or saved colors
Open ContrastCheck

SympifyApps

ClampCalc

Design & media

Generate one fluid CSS clamp() locally from two viewport and value endpoints, then verify the rounded code you copy.

  • Five focused fluid CSS routes
  • Exact rational line with endpoint deltas
  • No account, upload or saved CSS
Open ClampCalc

SympifyApps

CSVBridge

Text & data

Convert one strict CSV, semicolon, tab or pipe table to JSON locally while preserving quoted fields and every value as text.

  • Five focused CSV-to-JSON routes
  • Strict quotes, headers and rectangular rows
  • No account, upload or saved table
Open CSVBridge

SympifyApps

UnicodeLens

Text & data

Inspect text as Unicode scalar values, UTF-8 bytes and UTF-16 code units, or strictly decode U+ tokens without uploading text.

  • Inspect text or decode strict U+ tokens
  • Scalar-by-scalar UTF-8 and UTF-16 output
  • No account, upload or saved text
Open UnicodeLens

SympifyApps

QueryLens

Developer tools

Parse query-only text locally with explicit form or component rules while preserving duplicate names, source order and strict decoding errors.

  • Form and component decoding profiles
  • Ordered pairs, canonical query and JSON
  • No account, upload or saved query
Open QueryLens

SympifyApps

Base64Lens

Text & data

Encode or decode UTF-8 text locally with explicit standard Base64 or base64url alphabets, padding and strict canonical validation.

  • Encode and decode with explicit profiles
  • UTF-8 bytes, padding and canonical-bit evidence
  • No account, upload or saved text
Open Base64Lens

SympifyApps

UUIDLens

Developer tools

Generate UUIDv4, UUIDv7 and GUID text locally with Web Crypto, or strictly validate canonical RFC 9562 UUIDs.

  • UUIDv4, UUIDv7, GUID and validation
  • Version, variant, bytes and v7 timestamp
  • No account, upload or saved identifiers
Open UUIDLens

SympifyApps

WordCount

Text & data

Count words, visible grapheme characters, Unicode code points, UTF-16 units, UTF-8 bytes and lines locally.

  • Words, characters, bytes and lines
  • Named Unicode and encoding rules
  • No account, upload or saved text
Open WordCount

SympifyApps

EpochLens

Time & productivity

Convert signed Unix seconds through nanoseconds and strict offset-bearing ISO dates locally.

  • Seconds, milliseconds, microseconds and nanoseconds
  • BigInt precision and explicit offsets
  • No account, upload or saved values
Open EpochLens

SympifyApps

QRMaker

Design & media

Create static URL or text QR codes locally and download the same matrix as PNG or SVG.

  • URL, text, PNG and SVG
  • One matrix with explicit correction and quiet zone
  • No account, hosted redirect or payload upload
Open QRMaker

SympifyApps

MarkdownPreview

Text & data

Render core Markdown locally with raw HTML escaped and remote images disabled.

  • Preview, editor and plain-text copy
  • Documented safe rendering boundaries
  • No account, upload or remote images
Open MarkdownPreview

SympifyApps

YAMLCheck

Developer tools

Validate YAML 1.2 streams, duplicate keys, aliases and positioned syntax errors locally.

  • Validator, formatter and multi-document checks
  • YAML 1.2 core with bounded aliases
  • No account, upload or server parsing
Open YAMLCheck

SympifyApps

RegexLab

Developer tools

Test JavaScript regular expressions in a disposable worker with a hard 250 ms timeout.

  • Matches, groups and native replacement
  • Worker isolation and bounded output
  • No account, upload or saved text
Open RegexLab

SympifyApps

CronParse

Developer tools

Parse a strict five-field POSIX cron subset and enumerate future UTC or local matches.

  • Parser, checker and next runs
  • Explicit fields and DOM/DOW OR rule
  • No account, scheduler or saved expression
Open CronParse

SympifyApps

EnvCheck

Developer tools

Validate dotenv structure and compare .env.example names without showing any values.

  • Validation, duplicates and name comparison
  • Value-free results and redacted copies
  • No account, upload or exposed secrets
Open EnvCheck

SympifyApps

JSONLines

Text & data

Validate, format and convert bounded JSON Lines or NDJSON records locally.

  • Validator, formatter and JSON array output
  • Line-numbered errors and any JSON root type
  • No account, upload or stored records
Open JSONLines

SympifyApps

SemverCompare

Developer tools

Compare, parse and stably sort strict Semantic Versioning 2.0.0 strings locally.

  • Compare, prerelease, sort and increment
  • BigInt core fields and exact precedence
  • No account, registry lookup or saved versions
Open SemverCompare

SympifyApps

MetroBeat

Time & productivity

Set BPM and hear an accented beat divided into eighth notes, triplets, or sixteenth notes directly in your browser.

  • Beat, two, triplet, and four-part grids
  • Web Audio clock scheduling
  • No accounts or microphone
Open MetroBeat

SympifyApps

KnitGauge

Home & hobbies

Calculate stitches and rows from a measured swatch or convert pattern counts to your actual gauge with repeat-aware rounding.

  • Project and pattern-conversion modes
  • Exact ratios and repeat-valid alternatives
  • No accounts, uploads, or backend
Open KnitGauge

SympifyApps

PanRatio

Home & hobbies

Convert round, square, and rectangular baking pans by total base area, count, and a transparent recipe factor.

  • Round, square, and rectangular pans
  • Exact decimals with explicit pi limits
  • No account, recipe upload, or backend
Open PanRatio

SympifyApps

ThrowFit

Design & media

Calculate projector lens distance, screen size, or required throw ratio from explicit room geometry.

  • Distance, screen-size, and ratio modes
  • Exact unit conversion with visible assumptions
  • Local calculation with no signup
Open ThrowFit

SympifyApps

ImageResize

Design & media

Resize one static JPEG, PNG or WebP locally with exact output dimensions and byte evidence.

  • Pixels, percentage and three formats
  • Preview and download use the same Blob
  • No account, upload or saved image
Open ImageResize

SympifyApps

UTMLink

Developer tools

Build one UTM campaign URL locally while preserving unrelated query pairs and the original fragment.

  • Six explicit campaign fields
  • Raw unrelated pairs stay unchanged
  • No account, request or saved link
Open UTMLink

SympifyApps

XMLClear

Developer tools

Format, minify or check one XML document locally without changing mixed content.

  • Formatter, minifier and well-formedness check
  • Source spelling and protected whitespace stay visible
  • No account, upload or server parsing
Open XMLClear

SympifyApps

SQLClear

Developer tools

Format one SQL script locally with an explicit database dialect and review evidence.

  • Eight dialect profiles and small style controls
  • SQL, strings and comments stay in the browser
  • No account, execution, connection or query history
Open SQLClear

SympifyApps

FavBundle

Design & media

Turn one local image into an inspectable website favicon package.

  • ICO, six PNG sizes, manifest, HTML and ZIP
  • Explicit fit, colours, names and package evidence
  • No account, upload, logo design or saved assets
Open FavBundle

SympifyApps

VectorPNG

Design & media

Convert one validated local SVG into an exact, inspectable PNG.

  • Exact pixels, aspect lock and transparent or solid background
  • Restricted static profile with parsed PNG dimensions
  • No account, upload, external assets or saved files
Open VectorPNG

SympifyApps

RomanClear

Calculators

Convert decimal integers and Roman numerals locally under one explicit modern canonical profile.

  • Number to Roman and Roman to number
  • Components, canonical validation and round-trip evidence
  • No account, upload, hidden repair or saved input
Open RomanClear

SympifyApps

URLCodec

Developer tools

Encode or decode one URL component locally under an explicit RFC 3986 or HTML form profile.

  • Encode, decode and two named profiles
  • Strict UTF-8, byte trace and canonical round trip
  • No account, upload, network request or saved text
Open URLCodec

SympifyApps

GCDLCM

Calculators

Calculate exact GCD, GCF and LCM for an integer list locally with Euclidean steps.

  • GCD, GCF, LCM and five focused routes
  • Exact BigInt folds and remainder equations
  • No account, upload, floating point or saved integers
Open GCDLCM

SympifyApps

PrimeFactor

Calculators

Factor one bounded positive integer locally into exact prime powers with successful division steps.

  • Factorization, decomposition, steps and prime check
  • Exact BigInt factors and multiplication verification
  • No account, upload, network request or saved integer
Open PrimeFactor

SympifyApps

LoremKit

Text & data

Generate exact placeholder paragraphs, sentences, words or list items locally from a reproducible seed.

  • Four bounded units and three output formats
  • Deterministic seed with word and byte evidence
  • No account, prompt, network request or saved text
Open LoremKit

SympifyApps

ImageCompress

Design & media

Compress one static JPEG, PNG or WebP locally at fixed quality or toward a target byte budget.

  • JPEG, WebP, fixed quality and target KB
  • Exact Blob bytes with honest target status
  • No account, upload, resize or saved image
Open ImageCompress

SympifyApps

PDFMerge

Text & data

Merge complete PDF files locally in a visible order without uploading their contents.

  • Two to twenty complete PDF files
  • Exact file, page and output-byte evidence
  • No account, upload or stored document
Open PDFMerge

SympifyApps

CaseShift

Text & data

Convert plain text between six explicit Unicode case profiles locally without uploading it.

  • Upper, lower, sentence, title, capitalized and toggle
  • Visible rules and source/result code-point evidence
  • No account, upload, saved text or result URL
Open CaseShift

SympifyApps

EntityCodec

Developer tools

Encode or decode one layer of HTML character references locally without rendering or uploading the text.

  • Named, decimal and hexadecimal references
  • Unicode code-point handling and visible one-layer boundary
  • No account, upload, rendering or saved text
Open EntityCodec

SympifyApps

PDFSplit

Text & data

Split one PDF locally by strict page ranges, fixed chunks or individual pages.

  • Ranges, chunks and one PDF per page
  • Exact page, output and ZIP evidence
  • No account, upload or stored document
Open PDFSplit

SympifyApps

PDFRemove

Text & data

Remove exact pages or ranges from one PDF locally and download the retained pages as one new PDF.

  • Single pages and inclusive ranges
  • Exact removed, kept and output-byte evidence
  • No account, upload or stored document
Open PDFRemove

SympifyApps

JWTLens

Developer tools

Decode a compact three-part JWT locally while keeping every field explicitly unverified.

  • Header, payload and NumericDate claims
  • Strict Base64URL, UTF-8 and exact JSON
  • No account, upload or stored token
Open JWTLens

SympifyApps

PDFRotate

Text & data

Rotate all or exact PDF pages locally and download one newly serialized document.

  • All pages or strict inclusive ranges
  • Existing rotation plus an exact 90° or 180° turn
  • No account, upload or stored document
Open PDFRotate

SympifyApps

JSONYAML

Developer tools

Convert strict JSON to YAML or YAML to JSON locally without silent ambiguity.

  • Two directions and two indentation levels
  • Exact large integers and rejected YAML-only features
  • No account, upload or stored document
Open JSONYAML

SympifyApps

HashCheck

Developer tools

Calculate SHA-256, SHA-384 and SHA-512 for one local file and compare an optional published digest.

  • Three SHA-2 digests and exact comparison
  • Visible algorithm labels, lengths and match boundary
  • No account, upload, file history or digest logging
Open HashCheck

SympifyApps

PDFNumber

Text & data

Add consecutive visible page numbers to an exact PDF range locally and download one new document.

  • Six positions and four finite label formats
  • Exact source range, first number and final-label preview
  • No account, upload or stored document
Open PDFNumber

SympifyApps

LapWatch

Time & productivity

Run one local stopwatch session with pause, 500 lap splits, statistics and chronological CSV.

  • Lap, split and cumulative total evidence
  • Timestamp-derived display instead of counted ticks
  • No account, network or saved timing session
Open LapWatch

SympifyApps

GradientForge

Developer tools

Build linear, radial and conic gradients with positioned stops and copy exact CSS.

  • Linear, radial and conic functions
  • Two to eight explicit colour stops
  • No account, network or saved palette
Open GradientForge

SympifyApps

ShadowStack

Developer tools

Compose one to eight outer or inset shadow layers and copy exact CSS.

  • Ordered outer and inset layers
  • Offsets, blur, spread and opacity
  • No account, network or saved styles
Open ShadowStack

SympifyApps

GridWeave

Developer tools

Build explicit CSS Grid tracks and named rectangular areas, then copy matching CSS and HTML.

  • fr, px, auto and minmax tracks
  • Strict non-overlapping named areas
  • No account, network or saved layouts
Open GridWeave

SympifyApps

FlexWeave

Developer tools

Configure a Flexbox container and direct items, preview the browser layout, then copy matching CSS and HTML.

  • Direction, wrapping and both axes
  • Bounded grow, shrink, basis and order
  • No account, network or saved layouts
Open FlexWeave

SympifyApps

ImagePDF

Text & data

Turn ordered JPEG or PNG images into one PDF entirely inside your browser.

  • One PDF page per visible image
  • Fit, A4 or Letter with rotation
  • No account, upload or saved files
Open ImagePDF

SympifyApps

PixelPick

Design & media

Pick exact decoded image pixels and copy HEX, RGB or HSL with a local frequent palette.

  • Exact source coordinates and 11×11 magnifier
  • HEX, RGB(A), HSL(A) and eight frequent colors
  • No account, upload or saved image
Open PixelPick

SympifyApps

CropFrame

Design & media

Crop one exact image rectangle with freeform handles, pixel fields and common ratios.

  • Exact X, Y, width and height
  • Free, 1:1, 4:3, 3:2, 16:9 and 9:16
  • No account, upload or saved image
Open CropFrame

SympifyApps

WatermarkLocal

Design & media

Add one visible text watermark with exact position, size, opacity, angle and colour.

  • Up to 120 Unicode characters
  • Nine anchor positions and exact appearance
  • No account, upload or saved image
Open WatermarkLocal

SympifyApps

TypeDraft

Developer tools

Generate reviewable TypeScript interfaces or type aliases from a JSON sample without uploading it.

  • Nested objects, arrays, optional fields and unions
  • Deterministic declarations with explicit limits
  • No account, upload, history or result URL
Open TypeDraft

SympifyApps

PointerPath

Developer tools

Resolve RFC 6901 JSON Pointers or generate escaped leaf paths without uploading the document.

  • Exact root, object and array resolution
  • Correct ~0 and ~1 escaping with leaf paths
  • No account, upload, history or result URL
Open PointerPath

SympifyApps

EscapeJSON

Developer tools

Escape raw text as one strict JSON string or unescape one explicit layer without uploading it.

  • Explicit quoted or inner form with one strict pass
  • Readable or ASCII-only Unicode with valid surrogate pairs
  • No account, upload, history or result URL
Open EscapeJSON

SympifyApps

PageRaster

Text & data

Render selected PDF pages as measured PNG or JPEG files entirely in your browser.

  • Strict page ranges with verified dimensions
  • PNG or JPEG at 96, 150 or 300 PPI
  • No account, upload, history or remote URL
Open PageRaster

Independent color app

Hexees

Design & media

Browse a practical color reference and inspect HEX, RGB, and HSL values for digital colors.

  • Explore colors visually
  • HEX, RGB, and HSL values
  • Free to use
Open Hexees