I need to format or validate structured text
Use JSONFormat for JSON or YAMLCheck for YAML. Each tool states the accepted grammar, reports errors, and keeps the original meaning separate from display formatting.
Developer utilities
Choose a private browser developer tool
Formatting JSON, validating YAML, comparing text and inspecting source code are different jobs. This guide connects six focused tools that process the entered text or selected files in the browser, while preserving every existing product URL and its exact limits.
Input stays in the browserOne explicit job per toolNo account required
Start with the operation
Match the data task to the focused tool
Choose by the result you need. A formatter changes presentation, a validator checks a grammar, and a comparison explains differences; those outcomes are not interchangeable.
I need to compare two text versions
Use TextDiff for line and character differences, whitespace options and visible additions or removals. It compares text; it does not interpret a JSON or YAML schema.
I need to inspect source, a pattern or an encoding
Use SourceTally for repository counts, RegexLab for JavaScript regular-expression behavior, or Base64Lens for local encode, decode and evidence checks.
Know the boundary
Four distinctions that prevent the wrong tool choice
Keep syntax, meaning, comparison and measurement separate before acting on a result.
- JSON formatting is not schema validation
- A document can be valid JSON and still violate the field, type or business rules expected by another system.
- YAML syntax is not deployment correctness
- A parser can confirm YAML structure and duplicate-key policy, but it cannot prove that a service will accept or safely apply the configuration.
- Text diff is not semantic equivalence
- Whitespace and ordering options change which textual differences are visible; they do not prove two programs or data documents behave identically.
- Line counts are measurements, not quality scores
- SourceTally reports included files and line categories. More or fewer lines do not establish maintainability, security, completeness or value.
Focused collection
Six private tools for everyday developer data
Open the tool that matches the operation. Each destination states its browser boundary, supported input, limits and network policy before processing.
JSON format and validation
JSONClear
Format, minify and validate JSON locally while preserving large integer tokens and showing precise parse evidence.
YAML syntax and formatting
YAMLCheck
Parse, validate and format YAML streams locally with explicit duplicate-key, anchor, alias and scalar behavior.
Text comparison
TextDiff
Compare two text versions by line or character with explicit whitespace and case options and no uploaded text.
Repository source counts
SourceTally
Analyze supported local archives or public repository input with visible inclusion rules and language totals.
Regular-expression testing
RegexLab
Test JavaScript regular expressions against local sample text with flags, matches, groups and replacement output kept visible.
Base64 inspection
Base64Lens
Encode or decode text and files locally, distinguish standard and URL-safe alphabets, and verify exact byte evidence.
Practical sequence
A four-step private-tool check
- 1
Choose the exact operation
Decide whether you need formatting, syntax validation, text comparison, source measurement, pattern testing or Base64 conversion.
- 2
Remove secrets before pasting
Browser-local processing reduces transmission, but copied tokens, passwords, personal data and production payloads should still be replaced with safe samples.
- 3
Use the product-specific limits
Read the accepted formats, size bounds, parser behavior and network policy on the destination before selecting text, a file or a repository source.
- 4
Verify the result in its real system
Re-run important formatted data, configuration, regular expressions or decoded bytes in the authoritative environment. A browser utility does not certify deployment or security.
Common questions
Private browser developer tools
Do these tools upload pasted text or selected files?
The linked product pages state their exact network policy. JSONFormat, YAMLCheck, TextDiff, RegexLab and Base64Lens process supported input locally; SourceTally clearly distinguishes local archives from an explicitly requested public-repository fetch.
Should I use JSONFormat or YAMLCheck?
Use the parser for the actual source format. JSON and YAML have different grammar, scalar and duplicate-key behavior; changing file extensions does not convert one into the other.
Can TextDiff compare JSON or YAML?
It can compare their text, including optional whitespace handling, but it does not perform schema-aware or semantic data comparison. Format both sides consistently when textual structure matters.
Can a successful check prove production correctness?
No. These tools provide bounded syntax, transformation or measurement evidence. Independently verify important results in the target parser, application, repository and security context.
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