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Convert AVI to MP4 Online — Free AVI toMP4Converter
Convert AVI files to MP4 quickly. Reduce file size while keeping quality. Free, no installation needed.
This tool is being improved
Explore other toolsDaily limit reached
Fetching a video from a link can take longer than uploading a file — up to a minute or two for a long video.
Your file is kept — processing resumes automatically.
This limit resets tomorrow. Go Pro to never hit it again, on every tool.
Your file is kept: processing resumes where it stopped.
Your file is kept: processing resumes where it stopped.
One job at a time. Yours finishes, then this one starts.
Drop to upload
Drop your file here
Or use the other entry, it stays available.
MP4, MOV, AVI, MKV, WebM
Free to try · no account required
Free to try · no account required
Drop to upload
Convert to:
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Timings preserved
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Duration
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Free to try · no account required
Free to try · no account required
Quota is based on full video duration. Queued and running tasks are included; the exact balance is checked before transfer.
COMPATIBLE PLATFORMS
Your Hashtags Are Ready!
Hashtags copied to clipboard — paste them in your post!
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Conversion Complete!
Preview below. Download your file whenever you like.
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Translation Complete!
Preview below. Download your file whenever you like. Timecodes are preserved.
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Pick two different languages to start dubbing.
The sample plays in the target language so you can compare before starting.
Keep original voice underneath
Low volume, behind the translated voice.
Your Video Script
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Your video is received and saved. It will start as soon as a machine frees up.
It's ready
This stage works through the video end to end. The percentage will only move once it's done.
This is the longest stage of the job. It is moving, even when the number isn't.
Cancel now? The work already done will be lost and the file will have to be uploaded again.
Get an email the moment it's ready.
Klipa is preparing your preview
Your best clip is being cut and auto-reframed (face tracking). This preparation happens only once — about 30 seconds.
Upgrade to generate your clips with this style, or continue free with the Minimal style.
Burning in the captions…
Klipa is burning your captions into this clip, in the style you chose — identical to the preview. This takes a moment, keep the page open.
The burn failed — nothing was lost, you can retry.
This file is no longer available
Keep your videos between sessions and get free credits for your next exports.
Preparing your logo-free video… The download will start on its own.
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Convert THIS video in full · up to 2 GB / 2 h · one-off
File expired
Relaunch burningClean file, no watermark.
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Monthly limit reached
Your free plan hit its burn limit this month. Your settings are saved — unlock this result or go Pro to burn now.
Subtitle workshop
Your subtitled video is readyFree download stays available below: the videos will carry the Klipa logo in the center and bottom.
We're preparing your logo-free videos…
We couldn't prepare your logo-free videos. Write to us — your purchase is safely recorded.
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Your video is ready
Download the full video, in full quality
Find all your videos, wherever you are
Longer videos and larger files with Pro.
Your original video is still available. Try another tool:
You've used up your 120 minutes
Your downloads have used your allowance, and this video needs more. The Downloads plan opens 100 hours of video per month — enough to stop counting altogether.
- 100 hours per month — 12× your current allowance
- HD and 4K, without paying video by video
- Every platform, no app and no ads
No commitment — cancel in one click, any time.
Convert AVI to MP4 — Smaller Files, Universal Playback
AVI files are relics of an older era — bloated, poorly compressed, and incompatible with most modern devices. Converting AVI to MP4 slashes file size by up to 80% while making your videos playable on every phone, tablet, TV, and social platform. Klipa handles the conversion entirely in the cloud, so even a low-powered laptop can process large AVI files.
Have a collection of old AVI recordings? Convert them here, then use our compressor to shrink them further for archiving. If you need to add subtitles to legacy footage, the MP4 format is fully supported by our AI tools.
How to Convert AVI to MP4
Upload Your AVI File
Drag and drop your AVI file — we support common AVI codecs including DivX, Xvid, and uncompressed video. Files up to 500 MB without an account, 1 GB with a free account, 2 GB on Pro (2 GB on Studio). For oversized files, compress first.
Automatic MP4 Conversion
Our server re-encodes your AVI using modern H.264 encoding, dramatically reducing file size while preserving visual quality. Audio is converted to AAC for universal compatibility. The process typically completes quickly.
Download Your MP4
Your converted MP4 is ready to share, upload, or edit. Want to take it further? Add AI subtitles, convert to another format, or compress it even more.
Why Convert AVI to MP4?
Massive Size Reduction
AVI files are huge. MP4 uses modern compression for 50-80% smaller files.
Quality Preserved
Advanced encoding keeps your video looking great despite the smaller file size.
Play Anywhere
AVI doesn't work on phones. MP4 plays on every device and platform.
Fast Processing
Server-side conversion handles even large AVI files quickly.
MODERNIZE YOUR VIDEO LIBRARY
Digitizing Old Recordings
Camcorder footage, screen captures from the 2000s, and DVD rips are often stuck in AVI format. Convert them to MP4 and they become quickly playable on any modern device. After conversion, compress the output to save storage space.
Security Camera Footage
Many CCTV and security systems still export AVI. Convert to MP4 so footage can be shared via email, WhatsApp, or cloud storage without compatibility issues. Use our video converter if you need other output formats.
Sharing on Social Media
No social platform accepts AVI uploads. Convert to MP4 first, then add AI subtitles for better engagement on Instagram, TikTok, and YouTube. Our compressor ensures your file meets platform size limits.
Related Tools
AVI to MP4 — FAQ
Why are AVI files so large?
AVI uses minimal compression. Converting to MP4 with H.264/H.265 dramatically reduces size while maintaining quality.
Will I lose quality converting AVI to MP4?
The quality loss is negligible. Modern MP4 encoding preserves visual quality at a fraction of the file size.
Can I convert old AVI files?
Yes, we support common AVI codecs including DivX, Xvid, and uncompressed AVI.
What's the maximum file size?
The limit depends on your plan: 500 MB without an account, more with a free account, up to 2 GB on Pro.
How long does it take?
The time depends on the file size, duration, source codec, and chosen format.
Can I upload multiple AVI files?
Currently one file at a time. Each conversion takes just seconds.
Can I convert DivX and Xvid AVI files?
Yes, we support common AVI codecs including DivX, Xvid, MJPEG, and uncompressed AVI. The output is always a universally compatible H.264 MP4 file.
How much smaller will the MP4 be?
Typically 50-80% smaller than the original AVI, depending on the source codec. Uncompressed AVI files see the biggest reductions. For even more savings, run the output through our video compressor.
Will the audio be preserved?
Yes, the audio track is re-encoded to AAC format for maximum compatibility. If you only need the audio, try our video converter or extract it separately.
What Creators Say
Say Goodbye to AVI
AVI had its time, but MP4 is the standard now. Klipa's free AVI to MP4 converter modernizes your video files with smaller sizes, better quality, and universal compatibility — no software needed. Pair it with our compressor, AI subtitles, and format converter for a complete video toolkit.
