Developer Tools

Format, beautify, and minify JSON data with real-time validation. Configurable indentation (2/4/tab), instant error detection, copy and download. Free online JSON formatter for developers.

Decode and inspect JSON Web Tokens instantly. View color-coded header, payload, and signature. Check token expiration, claims, and algorithm — all in your browser. Free, private, no data sent to any server.

Encode text to Base64 or decode Base64 strings back to text instantly. Supports full UTF-8 for international characters and emoji. Free, private, runs entirely in your browser.

Encode text to URL-safe percent-encoding or decode percent-encoded strings instantly. Supports encodeURI, encodeURIComponent, and RFC 3986. Free, private, browser-based.

Encode special characters to HTML entities or decode entities back to text. Prevent XSS attacks and display code safely. Free, instant, browser-based.

Convert text to Morse code or decode Morse back to text instantly. Hear audio playback with Web Audio API. Supports A-Z, 0-9, and punctuation. Free online translator.

Convert numbers between binary, octal, decimal, hex, and base36 instantly. Bit visualization, copy per row, custom base 2-36. Free online developer tool.

Encode or decode text with ROT13 and ROT-N Caesar ciphers instantly. Adjustable rotation 1-25, visual cipher wheel, self-inverse. Free, private, browser-based.

Encrypt and decrypt text with AES-256-GCM using a password you choose. All processing happens in your browser via the Web Crypto API — your data never leaves your device. Try it free.

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files instantly. All processing in your browser via Web Crypto API — try it free, no signup.

Test regular expressions against text in real time with instant match highlighting. See all matches, capture groups, indices, and group names. Supports JavaScript regex flags g, i, m, s, u. Free online regex debugger for developers.

Build cron expressions visually with a 5-field editor. Preview next 5 run times instantly. Common presets, syntax guide, and copy to clipboard. Free online cron tool.

Build beautiful CSS gradients visually with a live preview. Supports linear, radial, and conic gradients with unlimited color stops, precise angle control, hex input, position percentages, preset gallery, randomizer, and one-click CSS copy. Free online gradient maker for web developers and designers.

Pick any color visually, convert between HEX, RGB, HSL, CMYK, and HSB instantly. Generate palettes and check WCAG contrast. Free online color tool.

Convert Unix timestamps to human-readable dates and ISO 8601 format instantly. Live clock, 14+ timezones, reverse date-to-timestamp mode. Free, runs in your browser.

Compare two blocks of text side by side instantly. See added lines highlighted green, deleted lines red, and unchanged lines gray. Line numbers on both sides, ignore-whitespace toggle, case-insensitive option. Free, private, runs in your browser.