The best offline file converter for Mac
By Himanshu Ranjan · Updated 8 November 2026
For converting many kinds of files offline on a Mac, FileDial covers the widest range in one app: PDFs, images, video, audio, documents and more, all with Wi-Fi off. Permute is a strong paid media converter, HandBrake is free for video, LibreOffice is free for office documents, FFmpeg suits Terminal users, and Preview handles basic image and PDF exports.
How we chose: FileDial is our product, so read this list with that in mind. We chose picks for offline file conversion from each vendor's own published information (product pages, pricing pages, support docs and privacy statements), checked on 2026-11-09, plus FileDial's own documented behavior. We did not lab-test every tool or run size or speed benchmarks on the others, so we quote no numbers for them. Order reflects fit for this search, not who made the app. FileDial is first here, and we explain why below; on other pages in this series, other tools rank above it. Checked 2026-11-09.
1. FileDial
FileDial is our app. It has 525 tools covering photos, PDFs, video, audio, documents, spreadsheets, subtitles, archives and slides, from Convert › PDF to Word and Convert › Convert to MP4 to Convert › Convert to MP3 and Convert › Convert to Word (DOCX). Every tool runs on the Mac and works with Wi-Fi off, and results are saved as new files beside the originals.
- Widest range of file types here
- Runs from Finder on many files at once
- Recipes and watched folders automate conversions
- Not free after the 1-day trial
- Needs macOS 14 or later on an Apple silicon Mac (M1 or newer)
- Mac only
2. Permute
Permute converts video, audio and images, exports PDF pages as images, and lists 100+ formats with presets and a drag-and-drop queue. Permute 4 requires macOS 26 and Apple silicon; Permute 3 is available for macOS 11 to 15 and Intel Macs.
- Clean, simple interface
- Many media formats
- Lower one-time price
- Not built for office documents or spreadsheets
- Current version needs macOS 26
3. HandBrake
HandBrake is an open-source video transcoder for Mac, Windows and Linux that converts most common video files to MP4, MKV or WebM, with crop, resize and subtitle options. It handles video only.
- Free and cross-platform
- Detailed quality controls
- Good presets
- Video only
- Cannot join clips or handle DRM-protected files
4. LibreOffice
LibreOffice is a free office suite that runs on macOS 11 or newer on Intel or Apple silicon. Opening a document and saving or exporting it in another format, such as a Word file to PDF, is a common free way to convert documents offline.
- Free office suite
- Opens and saves many document formats
- Exports PDF
- One document at a time through the interface
- Large install for occasional use
5. FFmpeg
FFmpeg's command-line tool converts multimedia files between formats and runs on Mac, Windows, Linux and more. It is the most flexible option for audio and video, at the cost of learning its syntax.
- Handles nearly any audio or video format
- Scriptable
- Free
- Command line only
- Media only
6. Preview and Finder Quick Actions (built into macOS)
Preview exports images to HEIC, JPEG, JPEG-2000, OpenEXR, PDF, PNG and TIFF, and converts several at once from one window. In Finder, the Convert Image and Create PDF Quick Actions work on selected files without opening an app.
- Already installed
- Works on selections in Finder
- Free
- Images and PDFs only
- Few options
Why FileDial is first on this page
We make FileDial, so we hold its ranking here to a simple test: this search asks for a general file converter that works offline, not a video tool or an audio tool. FileDial is the only pick that converts PDFs, images, video, audio, office documents and spreadsheets in one app, and every tool works with Wi-Fi off. That breadth is the reason it leads.
It is not the best at everything. HandBrake gives more video control for free, XLD is better for lossless audio, and LibreOffice is free for documents. If you only ever convert one kind of file, a specialist may suit you better and cost less.
Why offline conversion matters
Online converters ask you to upload the file, wait, and download the result. Besides the time this takes for large files, it puts your document on a server you do not control. In March 2025 the FBI's Denver field office warned that free online converters are increasingly used to spread malware and that such sites can scrape personal data. In 2024 Cybernews reported that two online PDF services exposed 89,062 user-uploaded files through open storage.
Desktop converters avoid both problems: the file stays on your Mac and the result comes back as fast as your Mac can process it.
Free combinations that cover most needs
You can assemble a capable free toolkit: Preview and Finder Quick Actions for images and PDFs, HandBrake for video, XLD or the Music app for audio, and LibreOffice for documents. The trade-off is that you need to remember which app does what and learn several interfaces.
A single app such as FileDial or Permute saves that switching, which matters most when conversions are a daily task rather than an occasional one.
Things to check before you choose
Check system requirements first: FileDial needs macOS 14 or later on an Apple silicon Mac, and Permute 4 needs macOS 26. Check batch support if you convert many files at once. And check what happens to your original: FileDial always saves a new file beside the original and offers Undo, while some tools overwrite in place.
Questions
Is there a file converter for Mac that works without internet?
Yes. FileDial, Permute, HandBrake, LibreOffice, FFmpeg and the built-in Preview app all convert files on the Mac itself. FileDial states that every one of its tools works with Wi-Fi off. Online converter websites, by contrast, need you to upload the file.
What is the best free offline file converter for Mac?
There is no single free app that covers everything, but a free combination works well: Preview and Finder Quick Actions for images and PDFs, HandBrake for video, XLD for audio and LibreOffice for documents. FFmpeg covers audio and video from Terminal.
Can I convert files in bulk on a Mac?
Yes. Finder's Convert Image Quick Action and Preview handle several images at once. FileDial runs any tool on many selected files and can convert automatically with watched folders. Permute applies edits individually or in bulk, and HandBrake has a queue for video.