Complete converter for $0
The former $89.99 lifetime product is now free for personal and commercial conversion, with no paid converter tier after export.
How to use the video converter software
Why choose UniFab Video Converter
Once sold for $89.99 as a lifetime license, UniFab Video Converter is now completely free. This is the full video converter, not a restricted trial, with no hidden converter charge, watermark, time limit, or file-size limit.
More than common formats
Use one video format converter for mainstream, specialist, device, web, audio, subtitle, and codec combinations.
Put your hardware to work
Use supported NVIDIA, Intel, or AMD encoding paths instead of depending only on CPU-based conversion.
No artificial job limits
Queue large files or full folders with no converter file-size limit, duration cap, or output watermark.
Control the final file
Remux compatible streams or choose the codec, bitrate, resolution, subtitles, audio, and quality settings you need.
One video format converter, 1000+ formats
Convert between 1000+ video formats
Convert mainstream containers, phone and social video, Apple formats, legacy media, transport streams, and web formats. Keep the source resolution, choose an output from 1080p to 480p, adjust codec settings, or remux compatible H.264 video and audio streams without re-encoding.
Extract audio or change listening formats
Create compressed, lossless, or surround audio from a video or audio source. Control bitrate and channels, and retain multiple language tracks when the selected output supports them.
Match the format to the playback device
Select a device brand and model instead of researching codecs. UniFab chooses a compatible video format, codec, and resolution for phones, tablets, TVs, consoles, streaming boxes, and media players.
Prepare video for publishing platforms
Web Video Converter provides destination-based output presets rather than browser processing. Choose where you plan to publish, and UniFab matches the codec, bitrate, resolution, and aspect ratio to major video and social platforms.
Keep the video quality your output needs
Use the video converter software to preserve the source resolution, choose an output up to an 4K container, or create smaller Full HD, HD, and SD versions. Control H.264 or H.265, frame rate, bitrate, encoding method, quality presets, and lossless remux when the streams are compatible.
Batch convert files and folders in one queue
Import multiple files or drag in a folder, then apply one output profile across the batch. Keep individual audio and subtitle choices when needed, merge files for the right workflow, monitor CPU, GPU, and video memory, and send every result to one output folder.
Accelerate supported conversions with your hardware
UniFab can use NVIDIA NVENC/CUDA, Intel Quick Sync, and AMD hardware encoding for supported jobs. If a hardware path is unavailable, the free video converter can fall back to software encoding; speed varies with the source, output codec, and computer.
Six editing tools inside the free video converter
Edit the video before you convert it. Open the built-in editor from any task to trim the timeline, crop or rotate the frame, adjust color and effects, add or remove a watermark, manage subtitles, change audio tracks and volume, or set playback speed before conversion.
Trim, crop and rotate
Trim at multiple points, crop to 16:9, 9:16, 1:1, or 4:3, and rotate the picture in four directions.
Color and effects
Adjust brightness, contrast, saturation, and gamma while watching the real-time preview.
Watermark
Add a text or image watermark, set its position and opacity, or remove an existing watermark from the input.
Subtitles
Burn in captions, soft-mux a selectable track, or export an external subtitle file with custom styling.
Audio
Adjust volume, add fades, change tracks, and preserve compatible multi-channel audio.
Speed
Set playback from 0.25x slow motion to 4x time-lapse, or build keyframed speed ramps.
Same UniFab app, 20+ AI tools beyond free conversion
Trusted by
"UniFab's GPU acceleration is the real deal. Anyone used to CPU-only converters will be shocked at how fast a Full HD job finishes."
"One of the most generous free tiers on the market. No time limit, no watermark, all formats. A clear winner among free Windows video converters."
"Editor's Pick for free Windows video tools. Subtitle handling, multi-track audio support and format breadth are above the field."
"Lossless remux on MKV to MP4 just works, no transcode penalty. Hard to beat the value when it costs nothing."
"UniFab takes the friction out of free converters. No nag screens, no upsells, no surprise watermarks. Just convert and go."
YouTech
Youtuber with 1.71M followers
"For a free product this is unfair. UniFab's lossless MKV → MP4 remux just works, GPU acceleration is on by default, and I haven't found a single format it can't handle. Replaced my paid converter in one afternoon."
Converting my entire family-trip Full HD MKV archive for the smart TV. UniFab nailed it without re-encoding. Saved a full weekend of waiting on the old converter.
Eric
Photographer
As a teacher I turn MKV class recordings into MP4s every day. UniFab is 3× faster than the free tool I used before, and the batch mode is a lifesaver.
Sophia
Vlogger
Extracted MP3 audio from 200 podcast videos in one overnight batch. Zero failures, no babysitting, MP3 quality identical to source. Free should never feel this premium.
Jackson
Videographer
FAQs about free video converter software
Learn more through our YouTube channel, guidebook, or community discussion.
Yes. The product once sold for $89.99 as a lifetime license and is now completely free. There is no hidden converter charge, watermark, time limit, file-size limit, or fee for personal or commercial conversion.
Yes. The software supports 64-bit Windows 11, Windows 10, Windows 8.1, and macOS.
UniFab supports more than 1000 video and audio combinations. They include MP4, MKV, AVI, WMV, MOV, and MP3, plus additional formats and profiles.
No. The video converter software processes your files locally on the computer.
UniFab can use NVIDIA NVENC/CUDA, Intel Quick Sync, and AMD hardware encoding for supported codecs and tasks. If a hardware path is unavailable, the converter can fall back to software encoding.
When an MKV contains compatible H.264 video and audio streams, UniFab can remux them into MP4 without re-encoding. Other stream combinations may require transcoding.
Yes. Choose MP3 under Audio output, set the bitrate and channels, and apply the profile to one video or a full batch.
Yes. Choose Direct render, Soft subtitle, or External subtitle mode, then preserve or select compatible multi-track audio.
Use the free desktop video converter for 1000+ formats, large files, folders, batch conversion, merge and subtitle workflows, hardware acceleration, and detailed output controls. Use the online video converter tool for a quick browser job.
UniFab Video Converter
Originally $89.99 lifetime, now 100% free forever, with batch processing and a built-in editor.
Tips & resources about video converter software
How to Convert MOV to MP4 Without Losing Quality: 7 Practical Methods
Learn how to convert MOV to MP4 by checking the source codecs before choosing a tool. This guide compares seven local, Apple-supported, command-line, and online methods, with practical advice for batch jobs, 4K and HDR footage, audio sync, and alpha channels.
MP3 to MP4 Converter: 4 Methods for Images and Waveforms
An MP3 needs a genuine video track before platforms such as YouTube can accept it as video. This guide compares local editors, a browser converter, cover-art workflows, and waveform tools, with clear advice on privacy, output settings, and troubleshooting. It also explains where UniFab fits after the initial MP3-to-MP4 export.
Top 8 AVI to MKV Converters in 2026 (Tested for Windows, Mac & Online)
Tested 2026 roundup of the 8 AVI to MKV converters worth using today — UniFab Video Converter, AVS Video Converter, HandBrake, VLC Media Player, CloudConvert, VEED.io, FreeConvert, and Converter App. Editor's pick is UniFab Video Converter for the cleanest free desktop workflow with batch processing, no watermark, and stream-copy lossless mode. Includes a scored comparison table, the remux vs re-encode decision framework, and 10 FAQs.
5 Ways to Convert MKV to MP4 Without Quality Guesswork
A 2026 hands-on guide to converting MKV (Matroska) to MP4 the right way. We benchmarked five tools on a 3.2 GB 4K H.265 source — UniFab Video Converter, CloudConvert, VLC, HandBrake, and FFmpeg — and unpack the container-vs-codec basics that make the difference between visually lossless remuxing and a degraded re-encode. Includes step-by-step workflows for every tool, troubleshooting for five common errors, and FAQs covering 4K, mobile, batch, and subtitle handling.
"Exactly what a free video converter should be: fast, watermark-free, and respects your privacy. The GPU acceleration alone is worth the download."