SumatraPDF reader supports the following document types:
- PDF (.pdf, .ai)
- eBook formats:
- unencrypted EPUB (.epub)
- MOBI / Kindle (.mobi, and un-encrypted .azw, .azw3, .azw4, .prc)
- FictionBook (.fb2, .fb2z, .fbz, .zfb2, .fb2.zip)
- Palm DOC (.pdb)
- plain text (.txt, .log, .nfo, .tcr, …)
- Markdown (.md, .markdown), rendered as GitHub Flavored Markdown
- comic book files: .cbz, .cbr, .cbt, .cb7 (and .ora)
- archive files (.zip, .rar, .7z, .tar) containing images
- DjVu (.djvu, .djv)
- Microsoft Compiled HTML Help (.chm)
- XPS (.xps, .oxps, .xod, .dwfx)
- SVG (.svg)
- images:
- PNG (.png)
- JPEG (.jpg, .jpeg, .jfif)
- GIF (.gif), including animations
- TIFF (.tif, .tiff), including multi-page
- BMP (.bmp, .dib)
- TGA (.tga)
- WebP (.webp)
- JPEG XR (.jxr, .hdp, .wdp)
- JPEG 2000 (.jp2, .j2k, .jpx, .jpf, .jpm, .j2c)
- AVIF (.avif)
- JPEG XL (.jxl)
- HEIF / HEIC (.heic, .heif) — built-in decoder; see below
If Ghostscript is installed, we support PostScript (.ps, .eps) and PJL (Printer Job Language) files.
HEIF / HEIC support #
SumatraPDF can open HEIF images (.heic, .heif) and AVIF (.avif) with a built-in decoder:
- HEIC (typical phone stills, HEVC-coded): decoded in-process; no Windows codec required for most files
- AVIF (AV1-coded): decoded in-process via dav1d
- Grids, overlays, and common transforms (crop / rotate / mirror) are handled for still images
If built-in decode fails, on Windows we still try the system WIC path (for example if a third-party HEIF codec is installed). That fallback is optional for typical HEIC/AVIF files.
You can make SumatraPDF the default program for handling those file types.