All tools

The tools hosted here run entirely in your browser, work without an account, and explain the standards they implement. Tools marked “separate site” open in a new tab.

Encoding

Base64 Encoder / Decoder

Live, UTF-8-safe text conversion with URL-safe and MIME options, file and image encoding to data URIs and <img> tags, Base64-to-file with type detection and preview, and an interactive explanation of how Base64 works.

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Security

JWT Decoder, Encoder & Editor

See a token's header and claims with readable dates and expiry, verify signatures with secrets, PEM keys, certificates or JWKS, and create or edit tokens with HMAC, RSA, RSA-PSS, ECDSA and EdDSA.

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Security

JWE Decoder, Encoder & Editor

See an encrypted token's header and what each of its five parts holds, decrypt it with a private key, shared key or password, and create or edit tokens with RSA-OAEP, ECDH-ES, AES Key Wrap, dir and PBES2. Nested JWTs are unpacked too.

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Security

Hash Generator

See up to 20 hashes of text side by side as you type, hash files of any size and check them against a published checksum, make a sha256sum-style checksum file, and generate HMACs with a text, hex or Base64 key.

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Generators

UUID & GUID Generator

Generate v4, v7, v1, v6, v5 and v3 UUIDs or Windows-style GUIDs, up to 10,000 at a time, as lowercase, uppercase, braces, URN or a JSON array. Paste any UUID to check it and see its version, variant and the time it was made.

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Security

Encrypt & Decrypt

Encrypt and decrypt text and files with AES (GCM, CBC, CTR, CFB, OFB, ECB), ChaCha20-Poly1305, Triple DES, DES and RC4, using a password or a raw key and IV. Password mode uses the OpenSSL format, so it also opens openssl enc files and CryptoJS strings.

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AgileSeparate site

Poker Planner

A free, real-time planning poker app for agile and Scrum teams. Everyone votes at once and cards stay hidden until the host reveals them. Fibonacci or T-shirt decks, a story backlog, and CSV export for Jira or Azure DevOps.

Visit poker-planner.com