Encode, Decode & Transform
Fast, private, browser-based tools for developers. No sign-up — just paste and go.
Encoding & Decoding
Base64 Encode
PopularConvert plain text or binary data into Base64 format instantly.
Base64 Decode
Decode Base64 strings back to readable text or binary data.
URL Encode/Decode
Encode or decode URLs, query strings and special characters.
Base64 Image
Convert images to Base64 strings and decode Base64 back to images.
HTML Entity Encode/Decode
Convert HTML special characters to entities and back.
Hex ↔ ASCII
Convert between hexadecimal and ASCII text representations.
Security & Tokens
JWT Decode
Inspect and verify JSON Web Token payloads and headers.
UUID Generator
Generate UUID/GUID v1, v4, and v5 identifiers instantly.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from any text.
Certificate Decoder
Parse and inspect SSL/PEM certificates in your browser.
SAML Decoder
Decode Base64-encoded SAML responses and inspect XML.
Developer Utilities
What is DecodeEncode.com?
DecodeEncode.com is a free collection of 14 browser-based developer tools for encoding, decoding and converting data — including Base64, URL, JWT, SAML, X.509 certificates, hashes, UUIDs, Unix timestamps, HTML entities, Hex/ASCII, Markdown and JSON↔YAML.
Every tool runs entirely client-side in JavaScript, so nothing you paste is sent to a server, and no account is required. Learn more about DecodeEncode.com
Frequently asked questions
- Is DecodeEncode.com free to use?
- Yes. Every tool on DecodeEncode.com is free to use, with no sign-up, no paywall and no usage limits.
- Is my data uploaded to a server?
- No. All DecodeEncode.com tools run client-side in your browser, so the text, tokens, certificates or images you paste are processed on your device and never uploaded.
- Can I decode a JWT without the secret key?
- Yes. A JWT's header and payload are only Base64URL-encoded, so the JWT Decoder can show them without any key. Verifying the signature, however, requires the secret or public key.
- Which formats does DecodeEncode.com support?
- Base64 (text and images), URL percent-encoding, HTML entities, Hex/ASCII, JWT, SAML responses, X.509/PEM certificates, MD5/SHA hashes, UUID v1/v4/v5, Unix timestamps, Markdown and JSON/YAML.
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BusinessReady to get started?
Pick a tool and transform your data in seconds — completely free.