Wikipedia and Wikimedia Commons
These original assets are hosted locally and have not been modified. Logos identify file formats; their appearance does not imply endorsement. Where no reliable format logo was available, the interface uses an extension label.
PDF file icon by Joe Roe, derived from Koreller, via Wikimedia Commons. Original file · CC0
JPEG
JPEG logo by the Joint Photographic Experts Group, vectorized by VulcanSphere, via Wikimedia Commons. Original file · Public domain
SVG
W3C SVG Logo. Designer: Harvey Rayner. Via Wikimedia Commons. Original file · CC BY-SA 4.0 (also PD-textlogo where below the originality threshold) · W3C SVG Logo
WebP
WebP logo, Google LLC; Commons vector by Simo99 and subsequent contributors. Via Wikimedia Commons. Original file · CC BY 4.0
EPUB
EPUB logo by Ralph Burkhardt, via Wikimedia Commons. Original file · Public domain
JSON
JSON logo by Douglas Crockford, via Wikimedia Commons. Original file · Public domain
MP3
MP3 logo of the Fraunhofer Institute for Integrated Circuits; designer unknown. Vectorized by Infanf, via Wikimedia Commons. Original file · Public domain
Local processing engines
Source archive manifest · Build references and source provenance
Image and archive engine source downloads and checksums
- ImageMagick WASM (Apache-2.0 wrapper) and its image-codec delegates. Complete notices.
- 7-Zip WASM (LGPL-2.1-or-later with the unRAR restriction). Wrapper license · 7-Zip license · unRAR terms · Rebuild recipe · Local stack API patch · Build manifest.
- ZetaJS (MIT) with the local LibreOffice engine (MPL-2.0 and component licenses). Exact covered-source references · Upstream component notices.
- docx and PptxGenJS (MIT) write local Word documents and PowerPoint presentations.
- ffmpeg.wasm wrapper (MIT), with FFmpeg core source and build scripts (GPL-2.0-or-later; codec dependencies carry their respective licenses). Download engine source and build scripts.
- PDF.js (Apache-2.0) and pdf-lib (MIT).
- fflate (MIT), SheetJS CE (Apache-2.0), and Mammoth (BSD-2-Clause).
- heic-to (LGPL-3.0-or-later) with libheif and libde265, and fonteditor-core (BSD-3-Clause).
- shadcn/ui, Base UI, React, TanStack Router, and Lucide icons.
- Inter by Rasmus Andersson, used under the SIL Open Font License 1.1.
Hosted processing engines
Server conversions use engines we host ourselves. Depending on the selected format, these include FFmpeg, ImageMagick, VTracer, LibreOffice, Calibre, Inkscape, 7-Zip, FontForge, Pandoc, Poppler, LibreDWG, ezdxf, ezdwf, numbers-parser, Tesseract, pstoedit and DjVuLibre. Each project retains its own license and notices in the engine distribution.
Conversion support does not grant rights to a file, font, codec, or trademark. Use files you are permitted to process. Engine license notices.