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Hakoro

About Hakoro

Hakoro is a growing collection of free online tools for everyday file jobs: converting and compressing images, merging and splitting PDFs, preparing eBooks for Kindle, and more.

The name comes from hako (箱), the Japanese word for box: Hakoro is a box of handy tools that work right in your browser.

Your files stay on your device

Most online tools upload your files to a server. Ours don't. Every tool runs inside your browser using WebAssembly and on-device AI, so your photos and documents never leave your computer or phone. It's faster too: there's no upload or download wait.

Free, with no sign-up

Because the work happens on your device, running the tools costs us almost nothing, so we can keep them free, without watermarks or accounts.

Open-source software

Hakoro is built on excellent open-source projects. Thank you to their authors:

  • Next.js, React: MIT
  • Tailwind CSS, Radix UI, cmdk, dnd-kit, react-dropzone: MIT
  • Lucide icons: ISC
  • pdf.js (Mozilla): Apache-2.0
  • pdf-lib (via @cantoo/pdf-lib): MIT
  • jSquash / Squoosh codecs: MozJPEG, libwebp, libavif, OxiPNG: Apache-2.0 and codec licenses
  • libheif and libde265, via libheif-js (HEIC photos): LGPL-3.0 (source)
  • Transformers.js (Hugging Face): Apache-2.0
  • ormbg background removal model (Max Schirrmacher): Apache-2.0
  • ONNX Runtime Web (Microsoft): MIT
  • fflate: MIT
  • qrcode (QR codes): MIT
  • yaml (eemeli): ISC
  • jsdiff (Diff Checker): BSD-3-Clause
  • hash-wasm (Hash Generator): MIT
  • Tesseract OCR and tesseract.js (Image to Text), with tessdata language data: Apache-2.0
  • react-image-crop (Crop Image): ISC
  • sql-formatter (SQL Formatter): MIT
  • cronstrue and Croner (Cron Expression Explainer): MIT
  • color-name (CSS color names): MIT
  • EFF Large Wordlist for Passphrases (Electronic Frontier Foundation), reformatted: CC BY 3.0 US (source)
  • Comlink (Google): Apache-2.0