Open-source software we use

PDF tools

• pdf-libMIT
• fontkit (@pdf-lib/fontkit)MIT
• PDF.jsApache-2.0
• qpdfApache-2.0
• qpdf-wasmISC
• fflateMIT

Thai OCR

• Tesseract.jsApache-2.0
• Tesseract.js-core (Tesseract OCR)Apache-2.0
• Tesseract language data (tessdata_best, Thai & English)Apache-2.0

Video, audio & images

• MI-GAN (object removal; Picsart AI Research, trained on Places2)MIT
• MI-GAN 512 Places2 ONNX pipelineMIT
• BiRefNet lite (background removal)MIT
• BiRefNet lite 512 ONNX exportMIT
• Transformers.jsApache-2.0
• Thonburian Whisper (Thai distilled small)MIT
• Thonburian Whisper ONNX conversionMIT
• Whisper Base (ONNX)MIT
• ONNX Runtime WebMIT
• MediabunnyMPL-2.0
• @mediabunny/mp3-encoderMPL-2.0
• LAME MP3 Encoder 3.100LGPL
• gifencMIT
• libheif-jsLGPL-3.0
• libheif (HEIC/HEIF decoder)LGPL-3.0
• libde265 (HEVC decoder)LGPL-3.0
• UTIF.js (TIFF)MIT
• ag-psd (Photoshop PSD)MIT
• pako (zlib)MIT AND Zlib

MP3 conversion uses the LAME MP3 Encoder (LGPL), compiled to WebAssembly by @mediabunny/mp3-encoder. We have not modified LAME. Download the LAME source code Opening HEIC outside Safari uses libheif and libde265 (LGPL), compiled to WebAssembly by libheif-js, unmodified. libheif-js source code

3D files

• three.js loaders and exportersMIT
• assimpjsMIT
• Open Asset Import Library (assimp)BSD-3-Clause
• Draco 3D decoder (Google)Apache-2.0
• web-ifc (IFC)MPL-2.0

Documents

• pandoc 3.10GPL-2.0-or-later
• pandoc-wasmGPL-2.0-or-later
• browser_wasi_shimMIT OR Apache-2.0
• docx-previewApache-2.0
• JSZip(MIT OR GPL-3.0-or-later)
• PptxGenJSMIT

Document conversion uses pandoc (GPL-2.0-or-later), its official WebAssembly build via pandoc-wasm, running as a separate program in the page, unmodified. pandoc source code · pandoc-wasm source code

Calculations

• decimal.jsMIT
• ZodMIT

The website

• Next.jsMIT
• ReactMIT
• next-intlMIT
• markedMIT
• QR Code Generator (Kazuhiko Arase)MIT
• promptpay-qr (PromptPay payload layout)MIT

Interface & animation

• three.jsMIT
• React Three FiberMIT
• dreiMIT
• MotionMIT
• class-variance-authorityApache-2.0
• Radix UIMIT
• Lucide iconsISC

Fonts

• Kanit (font)OFL-1.1
• Charmonman (font)OFL-1.1
• Sriracha (font)OFL-1.1

Exchange-rate data

• Frankfurter (exchange-rate API)MIT

Exchange-rate figures belong to the Bank of Thailand and the European Central Bank. We always show the source and say when a figure is a derived cross rate.