// 09 TOOLS · v1.0
Developer tools,
in your browser .
A small set of fast, private utilities. Everything runs locally in your browser — your data never leaves the page.
/* MANIFESTO */
- → Runs 100% in your browser
- → Zero uploads, zero tracking
- → Open source, MIT licensed
- → Bilingual (EN / ES)
9 / 9 tools
Encoding B64
Base64 — text
Encode and decode UTF-8 text to and from Base64.
→ /base64
Encoding IMG
Image ⇄ Base64
Convert an image to a Base64 data URL and back.
→ /base64-image
Encoding JWT
JWT decoder
Inspect a JWT — header, payload and expiration — without verifying.
→ /jwt
Security AES
AES encrypt / decrypt
Encrypt or decrypt text with AES and a passphrase.
→ /aes
Security PWD
Password generator
Generate strong random passwords with custom length and character sets.
→ /password
QR codes QR↓
QR reader
Decode a QR code from an uploaded image.
→ /qr-read
QR codes QR↑
QR generator
Generate a QR code for any text or URL.
→ /qr-generate
Data { }
JSON viewer
Validate, format and explore JSON as a collapsible tree.
→ /json
Data XLS
JSON → Excel
Convert a JSON array of objects into an .xlsx file.
→ /json-excel