FileFit — File Converter & Compressor

Convert documents between the formats upload portals ask for, and shrink them under a size limit (for example 2 MB or 200 KB), all offline on your own PC.

Extra options: size limit with one-click presets (100 KB to 5 MB), maximum width and height in pixels, combine many files into one PDF (drag to reorder), and save next to the original or into a chosen folder. Originals are never changed.

Install

• Windows: download FileFit-Setup.exe from the Releases page or the website and run it.
• Android: download FileFit-Android.apk from the Releases page or the website, tap it and choose Install (Google Play later).
• Linux: pipx install filefit, then filefit-cli --install-shortcut to add it to your app menu.
• Command line (any OS): filefit-cli photo.jpg --to pdf --max-size 2MB

DOCX → PDF / JPG needs Microsoft Word or the free LibreOffice installed. Every other conversion works with nothing else installed.

Releases are built automatically by GitHub Actions; see PUBLISHING.md. To build the single-file exe yourself on Windows, double-click build_windows.bat.

How size limits work

• JPG / WEBP: finds the highest quality that fits, and only shrinks the pixel size if quality alone is not enough.
• PNG: reduces colours, then pixel size. For photos, JPG reaches small sizes with far better quality.
• PDF: first recompresses the pictures inside the PDF (text stays selectable). If that is still too big, pages are turned into compressed images; the result says so.
• DOCX: recompresses the pictures inside the document.

If a file cannot reach the limit, the result shows ⚠ with its final size.

Contact

Made by Dipanjan Banerjee. Questions, bugs or ideas: dipanjanbanerjee20@gmail.com or open an issue.

Project layout

main.py                     starts the app
filefit/core/               conversion + compression engine (no GUI code)
filefit/gui/                PySide6 (Qt) desktop window and styling
tests/                      pytest suite for the engine
filefit/cli.py              command line tool (filefit-cli)
FileFit.spec                PyInstaller recipe for the .exe
installer/FileFit.iss       Windows installer (Inno Setup)
site/                       download website (GitHub Pages)
.github/workflows/          automatic builds, releases, website
build_windows.bat           local one-click Windows build

Run the tests: pip install -r requirements-dev.txt then pytest -q tests.

Android app

mobile/ holds the phone app: a Flet (Python + Flutter) screen on top of the same filefit/core engine, with a welcome tour, format and size-limit chips, and Share / Save buttons for the results. GitHub Actions builds FileFit-Android.apk with flet build apk.

Try it on a computer: pip install "flet[all]==1.0.5", then python mobile/main.py. Turning DOCX into PDF or pictures is not available on the phone (it needs Word or LibreOffice).

Fonts: Outfit and DM Sans, SIL Open Font License (see mobile/assets/fonts/).