Developer
JSON Formatter / Validator
Validate, format and compact JSON without uploading your input.
Open toolUUID Generator
Create cryptographically random UUID v4 identifiers in your browser.
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
Set the count and run. Input text is ignored. Generated IDs use the browser cryptographic random generator.
Supported input and limits
1–100 UUIDs per run. Random uniqueness is probabilistic, not a mathematical guarantee. 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.
Can I use these as secret passwords?
Use the password generator for passwords; these are standard UUID v4 identifiers.
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