AVI to AVIF Converter

How to Convert AVI to AVIF Online

1. Upload Your AVI File: Drag and drop your .avi clip onto the page or click "+ Add Files." Batch upload is supported, and codecs commonly found inside AVI containers — DivX, Xvid, MJPEG, H.264, MPEG-4 Part 2, Cinepak, uncompressed RGB — are decoded automatically.
2. Pick Frame Selection: Under "Frame Selection," choose Specific Frame and enter a Time (seconds) value (e.g., 3.5 for 2 seconds plus 500 ms) to grab a single still, or switch to Multiple Screenshots and set the capture interval anywhere from every 0.1 seconds to every 10 seconds. A 60-second clip at 1-second intervals produces 60 AVIF stills.
3. Tune Image Compression and Resolution (Optional): Pick a Quality Preset (Highest, Very High (Recommended), High, Medium, Low, Very Low, Lowest), enter a Specific file size in KB or MB, or drag the Image Quality (%) slider (1–100). For dimensions, leave Keep original, enter a Resolution Percentage, choose a Preset Resolution (4320p down to 144p), or type exact Width x Height.
4. Convert and Download: Click Convert. Frames are decoded in your browser session and re-encoded as AV1 stills — no sign-up, no watermark, no upload to a third-party server.

Why Convert AVI to AVIF?

AVI (Audio Video Interleave) was published by Microsoft on November 10, 1992 as part of Video for Windows, built on top of the 1991 Resource Interchange File Format (RIFF) chunk container. Three decades later, AVI archives still hold a huge volume of legacy footage: DivX/Xvid rips, screen recordings from older capture tools, MJPEG output from industrial and scientific cameras, and home-camera tapes digitized in the 2000s. AVIF, by contrast, is the AV1 still-image format standardized by the Alliance for Open Media — v1.0.0 published February 19, 2019, v1.2.0 published November 3, 2025 — and at equivalent perceived quality it stores photographic frames roughly 30–50% smaller than JPEG.

Pulling AVIF stills out of an AVI is the right move when you need to:

• Index a legacy archive at minimum cost. A 1080p AVIF thumbnail typically lands in the 60–100 KB range versus 150–300 KB for an equivalent JPEG, so a 50,000-clip catalog drops from gigabytes of preview imagery to a few hundred megabytes.
• Publish previews on the modern web. AVIF is supported in Chrome 85+, Firefox 93+, Edge 121+, and Safari 16.4+ (iOS Safari from 16.0), covering ~94% of global browser usage per caniuse — fast enough to ship as the primary thumbnail with a JPEG <picture> fallback for older clients.
• Extract reference frames from MJPEG industrial captures. MJPEG-in-AVI is the common output of microscope cameras, machine-vision rigs, and dashcams; AVIF preserves more high-frequency detail than re-encoding to JPEG.
• Build sprite sheets and key-frame storyboards. Multiple Screenshots at 1–5 second intervals produces a labeled stack of stills that is both small enough to email and high-quality enough for editorial review.
• Pull a single hero frame for a thumbnail or social card. Specific Frame plus a precise timestamp gives you the exact moment without decoding the whole file twice.
• Free up storage on long-form archives. Converting representative key frames to AVIF and dropping intermediate footage is a common workflow for surveillance retention and lecture-capture libraries.

AVI vs AVIF — Container and Format Comparison

Output Format Comparison for AVI Frame Extraction

Quality Preset Quick Guide

Frequently Asked Questions

Can I extract a single frame at a precise timestamp?

Yes. Choose Specific Frame and enter the time in seconds — decimals are accepted, so 7.25 is 7 seconds 250 ms in. The decoder seeks to the nearest decoded frame; for codecs with sparse keyframes (e.g., MPEG-4 Part 2 with long GOPs), the actual extracted frame may snap to the closest preceding I-frame or be reconstructed from it.

How do I batch-extract many frames at fixed intervals?

Pick Multiple Screenshots and set the interval. Available intervals run from every 0.1 seconds (10 fps) up to every 10 seconds, so a 5-minute clip at one frame per second gives you 300 AVIF stills, while the same clip at 10-second spacing gives you 30. Each frame is encoded independently — there are no inter-frame references — so deleting any single AVIF doesn't break the others.

Will AVIF stills look better or worse than JPEG at the same file size?

Better in most cases. AVIF inherits AV1's intra-prediction and transform tooling, which handles smooth gradients, sharp edges, and high-contrast text more cleanly than JPEG's 8x8 DCT — the typical artifact you see in JPEG (blocky banding around text and skies) is largely absent in AVIF at comparable bitrates. Practical testing puts AVIF at roughly 30–50% smaller for matched perceived quality. JPEG still wins on encode/decode speed and on universal compatibility with very old software.

Which browsers and operating systems can display AVIF?

Per caniuse data: Chrome 85+, Firefox 93+, Edge 121+, Safari 16.4+ on macOS Ventura, and Safari on iOS 16.0+ (full support from 16.4). Samsung Internet 14+, Opera 71+, and Android Chrome are also covered. Internet Explorer, Opera Mini, and KaiOS browsers do not support AVIF — for those audiences, extract as JPEG or WebP and use a <picture> element to serve the right format per client.

Can I get a lossless AVIF from an AVI frame?

Lossless AVIF is supported by the AV1 spec and is a good choice when the source AVI itself was lossless or near-lossless (uncompressed RGB, MJPEG at high quality, or a Lagarith/HuffYUV stream). Push the Image Quality (%) slider to 100 or pick the Highest preset. Note that lossless AVIF is much larger than lossy AVIF — frequently 1–4 MB at 1080p versus ~80 KB lossy — and most of the AVIF size advantage comes from the lossy mode.

What AVI codecs does this tool decode?

Any codec supported by the underlying decoding pipeline, which covers the common cases: DivX 3/4/5/6, Xvid, MJPEG, H.264 (sometimes wrapped in AVI), MPEG-4 Part 2, Cinepak, Indeo, and uncompressed RGB/YUY2. Exotic or proprietary codecs (Microsoft's old MS-CRAM, certain hardware-vendor codecs) may fail; in those cases you usually need to remux or re-encode the AVI in a player such as VLC first.

Why is my AVIF file larger than I expected?

Three common culprits. First, very high resolution: a 4K still encoded at the Highest preset can easily exceed 500 KB. Second, lossless mode (Image Quality = 100 or matching the Highest preset on certain clips) pushes file size into the megabytes. Third, complex or noisy frames — film grain, dense foliage, snow — compress poorly in any codec; switch to Very High (Recommended) or set a Specific file size target to cap the output.

Should I extract frames at the AVI's native resolution or downscale?

Downscale aggressively for thumbnails and previews. A 1920x1080 AVI frame downscaled to 640x360 typically lands in the 15–30 KB range as AVIF, which is small enough to ship as a web thumbnail without a separate srcset step. Use Resolution Percentage (e.g., 33%) or pick a Preset Resolution like 360p. Keep native resolution only when you need the full master frame for archival or downstream editing.

Can I extract one frame from AVI as AVIF and another as JPEG without re-uploading?

Run the conversion twice with different output settings, or use convert-avi-to-jpg for the JPEG pass. If you also want the original video in a more modern container, see convert-avi-to-mp4 — H.264/AAC in MP4 plays natively almost everywhere AVI does not.