Little tools, a bit of magic.
Convert, decode and encode right in your browser. Nothing is uploaded — your files never leave your machine.
Markdown → PDF / HTML
Turn a .md file (with Mermaid diagrams) into a clean PDF or a self-contained HTML page.
Mermaid → SVG
Render Mermaid diagrams — or every diagram inside a Markdown file — to standalone SVG files.
JWT Decoder / Encoder
Inspect a token's header, payload and expiry, verify its signature, or build and sign a new one (HS256/384/512).
Base64 Encoder / Decoder
Encode and decode text or files, UTF-8 safe, with URL-safe (base64url) support.
JSON Diff
Compare two JSON documents: every added, removed and changed value by path, plus a side-by-side view.
AES Encrypt / Decrypt
AES-GCM, CBC, CTR or ECB with a raw key or a password (PBKDF2). Output in base64 or hex.
RSA Keys, Encrypt & Sign
Generate key pairs, encrypt/decrypt with OAEP or PKCS#1 v1.5, and sign/verify. Java-compatible.
More coming soon
Image converters, JSON tools, and other small helpers.