MP4 to AVIF Converter

How to Convert MP4 to AVIF Online

1. Upload Your MP4 Files: Drag and drop or click "+ Add Files" to load MP4 or M4V video. Batch is supported — drop several clips and process them in one queue.
2. Pick a Frame Selection Mode: Choose Specific Frame to grab a single AVIF still at a chosen timestamp (Time in seconds, e.g. 12.5 for the frame 12.5s into the clip). Choose Multiple Screenshots to extract a sequence and set the Capture Rate — 0.1s (10 fps), 0.2s (5 fps), 0.5s (2 fps), or every 1 / 2 / 3 / 5 / 10 seconds for sparser sampling. Each captured frame is encoded as its own AVIF still.
3. Set Quality and Resize (Optional): Pick an Image Quality Preset (Highest, Very High, High, Medium, Low, Very Low, Lowest) or set a target file size percentage / exact KB-MB. AVIF supports Lossless (Yes/No) for pixel-perfect frames at larger size. Choose a Resolution Preset (144P, 360P, 480P, 720P, 1080P, 1440P, 2160P / 4K, 4320P / 8K), scale by percentage, or set custom width × height in pixels.
4. Convert and Download: Click Convert. Frames decode and encode in your browser session and download individually or as a ZIP — no sign-up, no watermark, no upload to a third-party server.

Why Convert MP4 to AVIF?

MP4 is a video container — typically carrying H.264 or H.265 frames. AVIF (AV1 Image File Format) is the still-image cousin, encoding a single decoded frame with the same AV1 compression that powers Netflix, YouTube, and Disney+ streaming. Pulling an AVIF still from MP4 is poster-frame / key-frame capture into the most efficient image format on the modern web. The result is a still image 50-70% smaller than JPEG at the same visual quality, with HDR and alpha support that JPEG can't touch. Common reasons people pull AVIF stills from MP4:

• Web-optimized poster frames and thumbnails — A 1080p AVIF poster is typically 30-80 KB vs 200-500 KB for the equivalent JPEG. Across a video gallery with hundreds of cards, that's the difference between Largest Contentful Paint passing or failing Core Web Vitals on 4G.
• HDR stills from HDR video — iPhone 12 Pro and later record HDR (HLG/Dolby Vision) MP4. JPEG only carries 8-bit SDR; AVIF preserves 10-bit / 12-bit HDR, P3 / Rec.2020 wide gamut, and the highlight detail you'd otherwise crush by re-encoding to JPEG.
• Open-graph and Twitter card images — Modern crawlers (Chrome, Edge, Safari 16+, iOS 16+) decode AVIF natively. Smaller share-card images preview faster on slow links and reduce CDN egress.
• CMS thumbnails for video libraries — WordPress, Ghost, Sanity, Contentful all accept AVIF since 2023. Bulk-extract thumbnails from a season of MP4 episodes once and save bandwidth on every visit.
• Image inputs for AI / vision pipelines that prefer modern formats — AVIF retains 10-bit color depth and lossless mode, useful for ML preprocessing where 8-bit JPEG quantization would discard signal.
• Print-quality stills with alpha masking — While most consumer MP4 doesn't carry alpha, you can mask the AVIF afterwards in Photoshop / Photopea / GIMP and re-save with transparency that JPEG simply doesn't support.

If you need lossless print-quality stills instead of compressed web stills, use video to PNG. For broadest legacy compatibility (every email client, every CMS), video to JPG is still the safest pick.

AVIF vs JPEG vs WebP — Format Comparison

AVIF Quality Preset Quick Guide

Frequently Asked Questions

Does this produce animated AVIF or single-frame AVIF stills?

This converter produces single-frame AVIF stills — one image per extracted frame. Use Specific Frame for one timestamp (one PNG-style still) or Multiple Screenshots at a chosen Capture Rate to get a sequence of stills (one AVIF per captured frame, downloaded as a ZIP). For an animated looping output, convert to MP4 to GIF or MP4 to WebP instead — animated AVIF tooling is still narrowly supported and most CMSes treat AVIF as a still format.

How big will my AVIF be vs the original JPEG / PNG screenshot?

A 1080p frame typically lands around 30-80 KB at the High preset, vs 200-500 KB for the same JPEG and 2-5 MB for a lossless PNG. The savings come from AV1's intra-frame coding — the same engine that powers Netflix and YouTube AV1 streams. A 4K (2160P) AVIF still is usually 100-250 KB compared to 0.8-2 MB JPEG.

Will my browser actually display AVIF?

Yes in Chrome 85+ (August 2020), Firefox 93+ (October 2021), Safari 16+ / iOS 16+ (September 2022), Edge 121+ (January 2024), and Opera 71+. Roughly 96% of global browser sessions decode AVIF as of 2026. For the remaining ~4% (mostly older Safari / Samsung Internet), serve a JPEG fallback via <picture><source type="image/avif">...</picture>.

Can I extract just one frame at a specific timestamp?

Yes — pick Specific Frame in step 2 and enter the Time in seconds (12.5 means 12.5s into the clip). The decoder seeks to that exact timestamp and writes one AVIF. Useful for grabbing a YouTube thumbnail, a documentation screenshot, or an open-graph card image.

Will the AVIF preserve HDR from my iPhone / Sony / GoPro footage?

If the source MP4 carries HDR (HLG, PQ / HDR10, or Dolby Vision metadata) and you keep the quality preset at Very High or higher, AVIF can preserve 10-bit color and the wide gamut. JPEG is 8-bit SDR only — extracting HDR video to JPEG visibly clips highlights. Note: not every encoder pipeline tags HDR metadata correctly; for critical HDR work verify the AVIF in a 10-bit-capable viewer (Chrome on a P3 display, Safari on iPhone).

How does AVIF compare to WebP for video frames?

AVIF wins on compression efficiency (typically 20-40% smaller than WebP at matched quality) and on HDR / 10-bit support. WebP wins on encode speed and on broader CMS / older-Safari support. For modern sites targeting Core Web Vitals, AVIF is the better pick; if you need to support iOS 15 or earlier, MP4 to WebP is safer.

What MP4 codecs are supported on the input side?

Any standard MP4 / M4V container — H.264 / AVC (the most common), H.265 / HEVC (iPhone HEIC-era recordings), MPEG-4, and AV1. Audio tracks are ignored since the output is a still image. If the file plays in QuickTime or VLC, frame extraction will work.

How many AVIF stills will I get from a Multiple Screenshots run?

Multiply duration by capture rate. A 60-second clip at "1 second per frame" produces 60 AVIFs; at 0.1s (10 fps) it produces 600. A 4K source at 10 fps for a minute can hit 30-80 MB total even in AVIF — start with 1 fps or 0.5 fps and refine downward.

Will my files be uploaded to your servers?

Conversion runs locally in your browser session — files don't go to a third-party storage layer for processing. Output AVIFs download directly to your device. No sign-up, no watermark, no file count cap. For very large 4K MP4 sources, the browser tab handles the decode and AV1 encode locally, which is CPU-intensive but private.