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Need help?How to Convert AVIF to Video Online
- Upload Your AVIF Files: Drag and drop or click "Add Files" to select AVIF photos. Batch conversion is supported — upload multiple static AVIFs to stitch into one slideshow.
- Pick an Output Format and Video Codec: Choose your container — MP4 (universal), MOV (Apple/QuickTime), WebM (web), AVI, MKV, FLV, 3GP, or M2TS. Default codec is H.264 — accepted by every browser, phone, and social platform. Pick H.265 / HEVC for ~40% smaller files at the same quality, VP9 for YouTube/web embedding, AV1 for the smallest output on modern devices, or MPEG-4 / Xvid / DivX for legacy compatibility. Set a Video Quality Preset (Highest → Lowest), target a specific file size in MB with auto-scale, or fine-tune CRF (18 = visually lossless, 23 = default, 28 = compact).
- Set Image Duration, Background Color, and Resolution (Optional): Animated AVIF (AVIFS) is detected automatically and its animation track — not the single-frame still item the same file also carries — is transcoded into the video, so frames and timing carry over with no two-step GIF detour needed. For static AVIF slideshows pick a per-image Image Duration (1/60s, 1/30s, 1/24s, up to 10 seconds per frame). Choose a Video Background Color (white, black, gray, or 22 named colors) to fill transparent pixels — MP4 has no alpha channel. Pick a Video Resolution Preset (4320p / 2160p / 1440p / 1080p / 720p / 480p / 360p / 240p / 144p), enter custom width × height, or scale by percentage. Use Video Trim to clip animated AVIFs to a specific start time and duration.
- Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared.
Why Convert AVIF to Video?
AVIF (AV1 Image File Format) is the newest still and animated image standard — built on the AV1 video codec, it delivers ~50% smaller files than JPEG and beats WebP and HEIC on quality. But animated AVIF (AVIFS) playback is still rare outside Chrome and Firefox, and almost no social platform, NLE editor, or messaging app accepts it as upload material. Converting to MP4/MOV/WebM unlocks universal sharing, editing, and embedding.
- Animated AVIF for social media — Instagram Reels, TikTok, X, Facebook, and YouTube Shorts reject animated AVIF uploads outright. Converting to MP4 (H.264) at 1080p resolves uploads in one step. Discord and Telegram also prefer MP4 for animated stickers shared outside their native sticker pipelines.
- Editing in Premiere, DaVinci, or CapCut — No consumer or pro NLE imports animated AVIF natively as of 2026. MP4 (H.264 or H.265) drops onto the timeline immediately with frame-accurate trimming, audio track support, and effects.
- iMessage, WhatsApp, and email sharing — iOS Messages and Mail show animated AVIF as a static frame or fail to render entirely. MP4 plays inline with autoplay, stays under Gmail's 25 MB cap with H.265, and ships through WhatsApp's in-chat video limit (about 100 MB by default) when compressed.
- Slideshow videos from AVIF photo collections — Lightroom, modern Android phones (Pixel 8+), and iOS 17+ now export to AVIF for cloud storage savings. Stitch a folder of static AVIFs into an MP4 slideshow with custom per-image duration — ideal for product reels, real estate walkthroughs, or photo montages.
- Embedding on websites and apps — Safari 16.4+ supports AVIF stills but animated AVIFS still has patchy support. The HTML5
<video>tag with MP4 source plays in every browser since 2010 and supports lazy-loading, autoplay, and inline mute. - Archiving and re-encoding — Animated AVIF support across desktop video players is uneven (VLC 3.0.20+ handles it, QuickTime does not). MP4 with H.264 is the safe long-term archival container for shareable footage.
Animated AVIF vs MP4 — Format Comparison
| Property | Animated AVIF (AVIFS) | MP4 |
|---|---|---|
| Underlying codec | AV1 (image profile) | H.264, H.265, VP9, AV1, MPEG-4 |
| Released | 2019 (AVIF 1.0) | ISO/IEC MPEG-4 Part 14 (2003) |
| Audio support | None | AAC, MP3, Opus, AC3, FLAC |
| Transparency / alpha | Yes (full alpha channel) | No (background must be flattened) |
| Looping | Built-in loop count | Use <video loop> or repeat in re-encode |
| Social media uploads | Rejected by IG, TikTok, X, FB, YT | Universal — every platform accepts |
| Video editor import | Not supported in Premiere, Resolve, CapCut, FCP | Native drag-and-drop |
| Browser playback | Chrome 85+, Firefox 113+, Safari 16.4+ stills only | Every browser since 2010 |
| Typical use | Tiny modern animated images, photo storage | Streaming, sharing, archiving |
Video Codec Quick Guide
| Codec | File size (relative) | Compatibility | Best for |
|---|---|---|---|
| H.264 | 100% (baseline) | Every device made since 2010 | Default — universal compatibility, social uploads |
| H.265 / HEVC | ~60% | iOS, Android 9+, Chrome/Edge/Safari since 2017 | Smaller files, 4K, iMessage sharing |
| VP9 | ~70% | YouTube, Chrome, Firefox, Android | Web embedding, royalty-free |
| AV1 | ~50% | 2022+ devices, modern browsers | Streaming, smallest size at high quality |
| MPEG-4 / Xvid | ~120% | Legacy DVD players, older Windows | Older hardware, archive compatibility |
Frequently Asked Questions
Why won't Instagram, TikTok, or YouTube accept my animated AVIF directly?
Major social platforms only accept video containers — MP4, MOV, and in some cases WebM — at their upload endpoints. They reject animated image formats like AVIFS, GIF, APNG, and animated WebP because their pipelines transcode to H.264 internally and need a real video stream as input. Converting your animated AVIF to MP4 with H.264 at 1080p resolves this in one step, with no perceptible quality loss at typical viewing sizes.
My animated AVIF has a transparent background — what happens during conversion?
MP4 has no alpha channel, so transparent pixels must be flattened against a solid color. XConvert lets you pick from 25 background presets (white, black, gray, plus aqua, blue, coral, crimson, cyan, gold, green, indigo, lime, magenta, maroon, navy, olive, orange, pink, purple, red, silver, teal, violet, yellow). Match the color to the destination feed's theme — black for dark-mode dashboards and TikTok, white for Instagram light mode. If you need transparency preserved, convert to WebM instead — VP9/AV1 in WebM supports alpha.
Will the animation timing stay the same after converting?
Yes. Animated AVIF stores per-frame durations in its pitm/timing boxes, and XConvert reads those timestamps to reconstruct the frame rate in the output video. A 24 fps animated AVIF comes out as a 24 fps MP4 by default. If your source has variable frame timing, the encoder normalizes it to a constant frame rate that all video players handle correctly.
Can I stitch multiple static AVIF photos into one MP4 slideshow?
Yes. Upload several static AVIFs, set the per-image Image Duration (anywhere from 1/60 of a second up to 10 seconds), pick a background color in case the sources have transparency, and XConvert merges them into a single video. Use "Merge images" mode for a unified slideshow or "Video per image" to output a separate clip from each AVIF. Useful for real estate listings, product reels, photo montages, or YouTube Shorts.
Should I pick H.264 or H.265 for AVIF conversions?
H.264 for maximum compatibility — works on every laptop, smart TV, projector, and corporate Outlook client. H.265 if your source is short and you want the smallest file for iMessage / WhatsApp / Snapchat sharing on Apple/Android devices made since 2018. AV1 is even smaller but takes ~3-5× longer to encode and isn't accepted by Instagram or TikTok yet — pick AV1 only if your destination is YouTube, Vimeo, or your own website.
Why is my MP4 larger than the source AVIF?
AVIF uses the AV1 image profile, which compresses each frame with extreme efficiency — often 30-50% smaller than equivalent video frames. MP4's H.264/H.265 codecs add container overhead, audio track allocation (even when silent), and key-frame metadata every 1-2 seconds. For a 24-frame animated AVIF, the MP4 may be 2-3× the AVIF size. Drop CRF to 28, switch to H.265, or pick "Lowest" Video Quality Preset to close the gap. For long slideshows the size difference disappears as motion content dominates.
What output resolutions and frame rates are supported?
XConvert supports every standard preset from 144p up to 4320p (8K). For animated AVIFs, the source resolution is preserved by default. For static AVIF slideshows, mismatched aspect ratios are letterboxed against your chosen background color, or you can scale to fit by percentage. Common targets: 1080×1920 vertical for Reels/TikTok, 1920×1080 for YouTube/landscape, 1080×1080 square for Instagram feed.
Can I convert MP4 back to animated AVIF?
Yes — see MP4 to AVIF for the reverse direction (handy for shrinking short loops down for modern web embeds and Pixel/iPhone photo libraries). Also useful: AVIF to GIF for legacy compatibility and AVIF to WebP when you need transparent animated output.
What's the file size limit?
XConvert handles AVIF files of any size including long animated AVIFs and large slideshow batches. Conversion runs on our servers, so the practical limit is upload size and connection speed on our servers cap (competitors like ezgif limit uploads to 200 MB and MConverter to 10 GB per file). There is no fixed file count limit on batch jobs.