DEVBOX
Useful tools.
Small utilities for development and daily tasks.
Available tools
17 toolsBase64 encoder / decoder
Encode and decode UTF-8 text or binary files using standard or URL-safe Base64.
Open toolDataConfig converter
Convert between JSON, YAML, TOML, and INI locally.
Open toolDataJSON formatter
Import, format, validate, minify, and download JSON locally.
Open toolDocumentsPDF organizer
Merge, reorder, rotate, duplicate, delete, extract, and split PDF pages locally.
Open toolDocumentsPDF page combiner
Crop, place, and scale multiple PDF pages together on one sheet.
Open toolDocumentsPDF to images
Export PDF pages as PNG, JPEG, or WebP images with page and DPI controls.
Open toolDocumentsPDF to text (OCR)
Extract text from scanned PDFs with browser-based OCR.
Open toolImagesImage converter
Convert images to PNG, JPEG, WebP, or ICO locally.
Open toolImagesImage metadata
Inspect photo metadata and create a cleaned PNG without uploading it.
Open toolImagesQR generator
Create custom QR codes and download them as PNG or SVG.
Open toolSecurityFile encryption
Encrypt and decrypt files with a passphrase using AES-GCM in your browser.
Open toolSecurityHash & checksum
Calculate and verify SHA-256 or SHA-512 checksums locally.
Open toolSecurityJWT inspector
Decode JWT headers and claims locally without verifying their signatures.
Open toolSecurityPassword strength checker
Estimate password guessability locally using bundled dictionaries and pattern matching.
Open toolSecurityRandom generator
Generate secure passwords, passphrases, tokens, and UUIDs locally.
Open toolTextMarkdown to PDF
Write Markdown, preview it, and save a clean PDF.
Open toolTextText diff
Compare text side by side or as a unified diff, with whitespace controls.
Open tool