// 20 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.

→ Runs 100% in your browser
→ Zero uploads, zero tracking
→ Open source, MIT licensed
→ Bilingual (EN / ES)

20 / 20 tools

// Encoding

Encode, decode and inspect text-based formats.

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Base64 — text Encode and decode UTF-8 text to and from Base64. Image ⇄ Base64 Convert an image to a Base64 data URL and back. JWT decoder Inspect a JWT — header, payload and expiration — without verifying.

// Security

Encrypt data and generate secure credentials.

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AES encrypt / decrypt Encrypt or decrypt text with AES and a passphrase. Password generator Generate strong random passwords with custom length and character sets.

// QR codes

Generate and decode QR codes from text or images.

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QR reader Decode a QR code from an uploaded image. QR generator Generate a QR code for any text or URL.

// Data

Validate, format and convert structured data.

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JSON viewer Validate, format and explore JSON as a collapsible tree. JSON → Excel Convert a JSON array of objects into an .xlsx file.

// Text

Compare and inspect plain text — all in your browser.

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Compare text Diff two texts with colored line and word highlighting.

// PDF

Merge, split and organize PDF files — all in your browser.

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Merge PDF Combine multiple PDFs into one file, in any order. Split PDF Extract a range of pages from a PDF into a new file. Images → PDF Turn JPG/PNG images into a single PDF, one per page. Rotate PDF Rotate all pages of a PDF 90, 180 or 270 degrees. PDF → images Export each PDF page as a PNG or JPG image. Compress PDF Reduce PDF file size by re-encoding its pages. Number pages Add page numbers to a PDF — choose the position.

// Image

Compress, convert and resize images — all in your browser.

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Compress image Shrink JPG/PNG/WebP file size with a quality slider. Convert image Convert images between PNG, JPG and WebP. Batch + ZIP. Resize image Resize by pixels or percentage, keep aspect ratio.