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Developer tools

JSON, Base64, URL encoding, JWT, hashes, UUID, timestamps and regex.

Runs in your browser · No upload8 available21 coming soon
JSON FormatterFormat, minify and validate JSON — errors pinpointed by line and column. Base64 Encoder / DecoderBase64 that handles UTF-8 properly, plus URL-safe output and file to data URI. Hash GeneratorFive hashes of any text or file at once, with checksum comparison. JWT DecoderRead a JWT and check when it expires — the token is never sent anywhere. Regex TesterLive match highlighting, capture group table and replace preview. Unix Timestamp ConverterEpoch time to date and back, with seconds vs milliseconds detected for you. URL Encoder / DecoderPercent-encode and decode text, and break any URL into its parts. UUID GeneratorBulk v4 and time-ordered v7 UUIDs, plus a decoder for any UUID.

Coming soon 21

XML Formatter Coming soonPretty-print XML with clean indentation and spot syntax errors. SQL Formatter Coming soonFormat messy or one-line SQL queries with readable line breaks and indentation. HTML Beautifier & Minifier Coming soonTidy HTML with proper indentation, or minify it by stripping whitespace. CSS Beautifier & Minifier Coming soonFormat CSS for readability, or minify it by removing whitespace and comments. JavaScript Beautifier & Minifier Coming soonFormat JavaScript for readability, or minify it to shrink file size. Markdown Preview Coming soonWrite Markdown, see the rendered result live and export it as HTML. Cron Expression Parser Coming soonExplain a cron expression in plain words and list its next run times. Color Code Converter Coming soonConvert colors between HEX, RGB, HSL and OKLCH with a live preview. CSS Gradient Generator Coming soonPick colors and angles to build linear or radial gradients and copy the CSS. HTML Entity Encoder / Decoder Coming soonConvert special characters to HTML entities like < and decode them back. Number Base Converter Coming soonConvert numbers between binary, octal, decimal and hexadecimal. Chmod Calculator Coming soonPick Linux file permissions and get the numeric (755) and rwx notation. IP Subnet Calculator Coming soonGet network address, broadcast, host range and mask from an IP and CIDR prefix. User Agent Parser Coming soonBreak down a user-agent string into browser, OS and device details. HTTP Status Codes Coming soonLook up what each HTTP status code, like 404 or 503, means and when it's used. JSON to TypeScript Coming soonPaste JSON and get matching TypeScript interfaces. Query String Builder Coming soonBuild a URL query string from key-value pairs, or break down a URL's parameters. JSON Diff Coming soonCompare two JSON documents and see added, removed and changed keys. Lorem Ipsum Generator Coming soonGenerate placeholder text in Latin or Korean by paragraphs, sentences or words. Slug Generator Coming soonTurn a title into a clean, lowercase, hyphenated URL slug. JSON ↔ YAML Converter Coming soonConvert between JSON and YAML and catch syntax errors along the way.

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