Developer Tools tools
Format and convert data, encode and hash strings, decode JWTs, generate UUIDs and passwords, and get AI help with code.
For developers, data analysts and IT teams.
16
free tools
Regex Generator & Explainer
Describe the pattern in words; get a tested regular expression.
Code Explainer
Paste code; get a plain-English walkthrough of what it does.
Password Generator
Strong random passwords and passphrases, generated on your device.
SQL Query Generator
Plain-English questions to correct SQL for your schema.
JSON Formatter & Validator
Pretty-print, minify and validate JSON in your browser.
Code Debugger
Paste the error and the code; get the cause and a fix.
Cron Expression Generator
Describe a schedule; get the cron expression and next run times.
Base64 Encode / Decode
Encode text to Base64 or decode it back, UTF-8 safe.
URL Encode / Decode
Percent-encode text for URLs, or decode it back.
UUID Generator
Random v4 UUIDs, one or a thousand.
Hash Generator (SHA-256)
SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text.
JWT Decoder
Decode a JSON Web Token’s header and payload, with expiry check.
Unix Timestamp Converter
Epoch seconds or milliseconds to dates, and back.
CSV ↔ JSON Converter
Convert CSV to JSON and JSON to CSV in your browser.
Markdown Editor & Preview
Write Markdown and see the formatted result side by side.
Color Converter & Contrast Checker
HEX, RGB and HSL conversion with WCAG contrast ratio.