Developer
JSON Formatter / Validator
Validate, format and compact JSON without uploading your input.
Open toolText Diff Checker
Compare two texts with an explicit line-by-line added and removed result.
Maximum 200,000 characters. Input is not stored.
Ready. Use Ctrl/⌘ + Enter to run.
Completed and failed run counts are stored only on this device.
How to use this tool
Paste the original in Input and the edited version in Revised text. Run to compare lines.
Supported input and limits
Up to 200,000 characters per side. Diff preserves line endings; it does not claim semantic or word-level comparison. Maximum main input: 200,000 characters.
Frequently asked questions
Does my input leave my browser?
No. A local worker processes it; text and files are not uploaded or stored.
What do the signs mean?
Plus marks an added line; minus marks a removed line; a space marks unchanged content.
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