DevCipher — Free Online Developer Tools Encode. Encrypt. Decode. Transform. A fast, privacy-first toolbox for developers. Everything runs locally in your browser.
Use the JSON Formatter, JSON Compare, AES Encryption and Decryption, URL Encode and Decode, Base64 Encode and Decode, String to JSON converter, Hash Generator, JWT Decoder and UUID Generator — free, with no sign-up and no uploads.
All developer tools URL Encode / Decode — Encode and decode URLs side by sideBase64 Encode / Decode — Encode and decode Base64 side by sideBase64 Encoder — Encode text or files to Base64Base64 Decoder — Decode Base64 back to textBase64URL Encoder — URL-safe Base64 without paddingBase64URL Decoder — Decode URL-safe Base64URL Encoder — Percent-encode text for URLsURL Decoder — Decode percent-encoded textHex Encoder — Convert text to hexadecimal bytesHex Decoder — Convert hexadecimal bytes to textBinary Encoder — Convert text to 8-bit binaryBinary Decoder — Convert 8-bit binary to textUnicode Encoder — Escape characters as \uXXXXUnicode Decoder — Turn \uXXXX escapes into textHTML Entity Encoder — Escape &, <, >, quotes for HTMLHTML Entity Decoder — Turn entities back into charactersImage to Base64 — Convert an image to a Base64 data URIBase64 to Image — Decode Base64 to an image and download itAES Encrypt / Decrypt — AES-128/192/256 encryption and decryptionRSA & PEM Tools — Generate keys, encrypt, decrypt, sign, verifyHash Generator — MD5, SHA-1/2/3, SHAKE and BLAKE2HMAC Generator — Keyed hashes: HMAC-SHA256 and moreString ⇄ JSON — Convert escaped strings to JSON and backJSON Formatter — Format, validate and minify JSONJSON Comparator — Find differences between two JSON documentsJSON Tree Viewer — Explore JSON as an expandable treeJSON to Code — Generate types for TypeScript, Java, Go, Python, C#JWT Decoder — Decode and inspect JSON Web TokensJWT Generator — Create signed HS, RS and ES tokensURL Parser — Break a URL into its componentsQuery String Parser — Parse and build query stringsUUID Generator — Generate UUID v4 and v7Password Generator — Strong random passwordsRandom String Generator — Secure random strings and tokensTimestamp Converter — Unix timestamps ⇄ human datesNumber Base Converter — Binary, octal, decimal, hex and moreColor Converter — HEX, RGB and HSL with contrast checkRegex Tester — Test JavaScript regular expressionsCSV ⇄ JSON — Convert between CSV and JSONYAML Formatter — Format, validate and convert YAMLXML Formatter — Pretty print, minify and validate XMLSQL Formatter — Format SQL for many dialects