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JSON Formatter & Validator
Validate, prettify, minify, copy, and download JSON.
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Developer · Local browser tools
Format, encode, decode, validate, hash, convert, and generate developer data locally. Files and pasted tool inputs are processed in your browser and are not uploaded to any server.
Available now
Functional tools with crawlable routes, clear limitations, and no account requirement.
Validate, prettify, minify, copy, and download JSON.
Decode JWT headers and payloads without claiming signature verification.
Encode or decode UTF-8 text and local files as Base64.
Generate batches of cryptographically random UUID v4 identifiers.
Test regular expressions in a disposable worker with a timeout.
Create SHA-256, SHA-384, or SHA-512 digests for text and files.
Convert Unix seconds or milliseconds to UTC, ISO, and local dates.
Encode or decode URL components and complete URLs.
Convert JSON and YAML with a safe standards-based local parser.
Format standard SQL and common database dialects.
Preview GitHub-flavored Markdown through sanitized local HTML.
Create customizable passwords with Web Crypto randomness.