Convert anything local
Images, audio, video, PDF, text/subtitles, and archives — converted on your machine with ffmpeg, ImageMagick, Poppler, Ghostscript, and Rust when available.
Desktop · macOS · Windows · Linux · Fully offline
Can you convert this file without uploading it?OFC.
Offline File Converter — the local desktop app that turns images, audio, video, PDFs, and archives into what you need. Files stay on your machine. Of course.
- 100% offline
- No uploads
- MIT license
- No payment gates
- Batch + watch
- Automate locally
- Native desktop
- Tauri 2 + Rust
Features
A private file converter that actually lives on your desktop
OFC is built for people who need format conversion without cloud risk — creators, teams with NDAs, and anyone tired of “free” upload sites.
Batch that respects privacy
Queue whole folders, keep working, and finish without shipping sensitive media to someone else’s servers.
Toolkit, not just convert
Compress, resize/crop, rotate/flip, trim, speed, extract frame, strip metadata, collage, batch rename, and DOCX export.
PDF split, merge, redact
Handle everyday PDF chores locally — including merge, split, and redact — without a web upload form.
Tray + watch folder
Keep OFC in the tray, drop files into a watched folder, and let local automation do the boring parts.
History & preferences
Recent files, conversion history, and preferences so your offline workflow feels like a real product — because it is.
How it works
Local in four steps. Cloud optional forever.
- Step 1
Install once
Download the native app for macOS, Windows, or Linux. No account. No browser extension.
- Step 2
Drop files in-app
Open or drag files into the OFC window, or point a watch folder at a directory you already use. Not a global OS Shift-drag hook — everything stays inside the app.
- Step 3
Convert locally
OFC runs conversions with local engines (ffmpeg, ImageMagick, Poppler, and friends when present). Your pixels never leave the box.
- Step 4
Ship the output
Grab results from history or recent files — then share only what you choose to share.
Formats
Best-effort support for the formats you actually use
OFC aims for broad local coverage. Exact availability depends on system helpers — especially ffmpeg, ImageMagick, and Poppler (plus Ghostscript where relevant). *RAR extract when the runtime is available.
Images
- JPG
- PNG
- WebP
- HEIC
- TIFF
- SVG
- AVIF
- BMP
- GIF
Audio
- MP3
- M4A
- WAV
- FLAC
- OGG
- Opus
- AIFF
- WMA
Video
- MP4
- MOV
- MKV
- WebM
- AVI
- WMV
- GIF
Documents & more
- Text
- SRT
- VTT
- ZIP
- TAR
- GZIP
- RAR*
Privacy / Offline
Your files never upload. That is the product.
Most “free converters” are upload forms with a privacy policy you skim after the fact. OFC is different: conversion is local, offline, and designed so sensitive media never has to leave your laptop.
- No cloud conversion pipeline
- No account required for core conversion
- MIT licensed — inspectable, redistributable
- Built for private workflows and NDAs
“Can you convert this locally?”OFC.
Offline File Converter. The tongue-in-cheek name is the point: when someone asks if you can convert a file without the cloud, the answer is of course.
Powered locally by ffmpeg, ImageMagick, Poppler, Ghostscript, and Rust — wrapped in Tauri 2 + React + TypeScript.
Download
Get OFC for your desktop
Builds for macOS, Windows, and Linux are coming soon. Bookmark this page — when downloads ship, they land here. Free, MIT-licensed, no payment gates in v1.
Note: some conversions need system ffmpeg, ImageMagick, and/or Poppler installed. Format support is best-effort for your machine.
- macOSApple Silicon & IntelComing soon
- Windowsx64 installerComing soon
- LinuxAppImage / packageComing soon
FAQ
Offline file converter questions, answered
Does OFC upload my files anywhere?
No. OFC is fully offline. Conversion runs on your computer. Your files never leave your machine.
What does OFC stand for?
Offline File Converter. It is also the correct answer to “Can you convert this file without sending it to the cloud?” — OFC.
Which platforms are supported?
OFC is a native desktop app for macOS, Windows, and Linux.
Is OFC free?
Yes. OFC is MIT-licensed with no payment gates in v1.
What system tools does OFC need?
Some conversions rely on helpers installed on your system — notably ffmpeg, ImageMagick, and Poppler (plus Ghostscript where relevant). Format support is best-effort and depends on what is available locally.
How do I add files — is it a global OS drag?
No. Drop and open flows happen inside the OFC app window. OFC is not a global OS Shift-drag interceptor; you bring files into the app (or a watch folder you configure), then convert locally.
What file types can I convert?
Images (JPG, PNG, WebP, HEIC, TIFF, SVG, AVIF, BMP, GIF), audio (MP3, M4A, WAV, FLAC, OGG, Opus, AIFF, WMA), video (MP4, MOV, MKV, WebM, AVI, WMV, GIF), PDF, text/SRT/VTT, and archives (ZIP, TAR, GZIP; RAR extract when available). Exact support depends on your system tools.
Can I batch convert and watch a folder?
Yes. OFC supports batch conversion, a system tray, watch folders, history, recent files, and preferences for local automation.
What about PDF tools?
OFC includes PDF split, merge, redact, and related helpers alongside image, audio, and video tools like compress, resize, crop, rotate, trim, speed, extract frame, strip metadata, collage, batch rename, and DOCX export.
What is the tech stack?
OFC is built with Tauri 2, React, TypeScript, and Rust for a small, fast, native desktop experience.