Developer tools that respect your data
Free, focused utilities from The Seasoned Programmer — encode, decode, inspect and sign, right in your browser. Nothing you paste ever leaves your device.
Tools
All tools
Encoding
Base64 Encoder / Decoder
Encode and decode text, files and images as Base64.
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Security
JWT Decoder, Encoder & Editor
Decode, verify, create and re-sign JSON Web Tokens.
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Security
JWE Decoder, Encoder & Editor
Decrypt, create and re-encrypt encrypted JSON Web Tokens.
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Security
Hash Generator
MD5, SHA-256, SHA-512, SHA-3, BLAKE3 and more, for text and files.
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Generators
UUID & GUID Generator
Random v4, time-sorted v7 and name-based v5 UUIDs, one or thousands.
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Security
Encrypt & Decrypt
AES, ChaCha20, Triple DES and DES with a password or a key.
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AgileSeparate site
Poker Planner
Planning poker for teams that estimate together.
Visit poker-planner.com(opens in a new tab)More on the way
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Private by design
The tools hosted here run in your browser. Your text, files, tokens and keys are never sent to a server.
Fast and free
No sign-up, no installs, no limits. Pages load instantly and keep working offline once open.
Built to teach
Each tool explains the standard behind it, with code examples in the languages you use.