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Add Your Images
Drag and drop AVIF files onto the page, or click "Add Images" to browse. Also accepts JPG, PNG, and WebP—they'll convert to AVIF output. Up to 50 files at once (100MB max per file).
Compress AVIF
Reduce AVIF file size 50% vs JPEG without uploading
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Instant Processing
Unlimited Files
Free Forever
Drag & drop your files here
Max 50 files • Max file size: 100MB
Accepted formats: .avif, .jpg, .jpeg, .png, .webp
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75%
Compression Settings
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image.jpg
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🗜️ Smaller file✨ Better quality
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What is AVIF? The Next-Generation Image Format
50% smaller than JPEG, 20-30% smaller than WebP
AVIF (AV1 Image Format) is developed by Alliance for Open Media—a coalition of Google, Mozilla, Cisco, and others. Released in 2019, AVIF is based on the AV1 video codec, the same technology powering next-gen video streaming. The goal: create the most efficient image format, period.
Two Compression Paths, One Format
Like WebP, AVIF supports both lossy and lossless compression. Lossy mode (AV1 intra-frame) delivers files 50% smaller than JPEG and 20-30% smaller than WebP at equivalent visual quality. Lossless mode beats PNG by 10-15%. The advantage? You can have lossy compression with full transparency—something JPEG can't do—and HDR support (10/12-bit color depth) for future-proofing.
Browser Support: 90%+ Global (as of 2024)
AVIF adoption was slow initially. Safari only added support in March 2024 (Safari 16.4+, iOS 16.4+), and Edge followed in January 2024 (Edge 121+). Before that, Chrome (85+, 2020) and Firefox (93+, 2021) were early adopters. Today, 90%+ of users globally can view AVIF images. The format is production-ready for modern web projects.
The Trade-Off: Encoding Speed
AVIF's sophisticated AV1 codec is 3-5x slower to encode than WebP or JPEG. What takes 1 second for JPEG takes 3-5 seconds for AVIF. For single images, it's manageable. For batches, parallel processing (which we use) becomes essential. The compression gains—50% smaller files—are worth the wait for most use cases.
100% Browser-Based AVIF Compression
This tool compresses AVIF images entirely in your browser using WebAssembly. We use libaom (Alliance for Open Media's reference encoder). Your files never leave your device—no upload to any server. Works offline after the page loads. Complete privacy guaranteed.
How to Compress AVIF Images in 3 Steps
Free, private, and entirely in your browser
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Choose Compression Mode
Five presets available. Maximum Compression (default, quality 50, speed=4) gives smallest files. Lossless preserves every pixel. Target Size hits exact limits (100KB, 50KB). Custom Quality slider (1-100). High Quality (quality 85) for professional photos.
AVIF encoding is slower but produces smallest files
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Download Results
Compression takes 3-5 seconds per file (we use 4-6 parallel workers for batches to speed this up). Download files individually or grab everything as a ZIP. Our "never return larger" guarantee keeps your original if compressed size isn't smaller.
AVIF vs WebP vs JPEG: Which Format Wins?
A practical comparison for modern web developers
AVIF
Best for: Modern web projects where file size matters most, high-quality photos, cutting-edge performance.
Why: 50% smaller than JPEG, 20-30% smaller than WebP at equivalent quality. Supports transparency, lossy AND lossless modes, HDR (10/12-bit color depth). 90%+ browser support.
File SizeSmallest
EncodingSlow
WebP
Best for: Modern web projects where encoding speed matters, when AVIF isn't worth the extra compression time.
Why: 25-35% smaller than JPEG. Fast encoding (1 second vs 3-5 seconds for AVIF). 97%+ browser support. Transparency support. Good balance of size and speed.
File SizeMedium
EncodingFast
JPEG
Best for: Universal compatibility, legacy systems, email attachments, when 100% browser support is required.
Why: 100% browser support (including IE). Lossy only—no lossless mode. No transparency (alpha becomes white). Larger files than WebP/AVIF but universally recognized.
File SizeLargest
Support100%
Quick decision for 2024: Use AVIF for photos where file size is critical (blogs, galleries, product images). WebP when you need faster encoding or slightly broader compatibility. JPEG for email attachments or legacy systems. PNG still wins for archival and 100% browser support with transparency.
The Numbers: Compression Benchmarks
Testing a 3MP photo (2000Ă—1500 pixels): JPEG at quality 85 = 450KB. WebP at quality 80 = 280KB (38% smaller). AVIF at quality 75 = 180KB (60% smaller than JPEG, 36% smaller than WebP). For lossless: PNG = 2.1MB, WebP lossless = 1.5MB (29% smaller), AVIF lossless = 1.3MB (38% smaller than PNG, 13% smaller than WebP).
Why AVIF Encoding is Slow
AV1 codec uses highly sophisticated prediction and transform coding. It achieves best-in-class compression at the cost of encoding time. Speed parameter ranges from 0 (30 seconds per image, best compression) to 10 (1 second, worst compression). We use speed=6 (balanced, 3 seconds) for high quality and speed=4 (better compression, 5 seconds) for maximum compression. This is why parallel processing with 4-6 workers is essential.
Your AVIF Files Stay Private
100% browser-based processing via WebAssembly
Unlike other compression tools, we process everything locally in your browser. Your browser loads libaom (Alliance for Open Media's AV1 encoder, compiled to WebAssembly), decodes your image, compresses it, and outputs the result—all in your device's memory. No upload. No storage. No exposure. For next-gen formats like AVIF, privacy is especially important for early adopters compressing high-quality photos and client work.
Works Offline After Page Loads
Once the page loads and caches the WebAssembly modules, you can disconnect from the internet and continue compressing. This is perfect for confidential images—client photos, unpublished designs, personal documents. GDPR compliant by architecture—technically impossible for us to see your files because they never leave your browser.
AVIF Browser Support
90%+ global coverage as of 2024
The Adoption Timeline
AVIF was released in 2019 but adoption was slow. Chrome and Firefox were early adopters (2020-2021). Safari was the holdout—only adding support in March 2024 (Safari 16.4, macOS 13.3+, iOS 16.4+). Microsoft Edge followed in January 2024 (Edge 121+). This milestone brought AVIF to 90%+ global browser coverage, making it production-ready for modern web projects.
Fallback Strategy
For the ~10% without AVIF support (mostly older iOS versions and Internet Explorer), use the <picture> element to serve AVIF with WebP/JPEG fallback. Most modern frameworks and CDNs handle this automatically.
Frequently Asked Questions
Everything you need to know about AVIF compression
AVIF (AV1 Image Format) is a next-generation image format developed by Alliance for Open Media, based on the AV1 video codec. It achieves 50% smaller files than JPEG and 20-30% smaller than WebP at equivalent quality, with support for both lossy and lossless compression plus transparency.
AVIF is 20-30% smaller than WebP at equivalent quality and offers better visual fidelity. However, AVIF encoding is 3-5x slower. WebP has slightly broader browser support (97% vs 90%). Use AVIF for maximum compression and quality, WebP for faster encoding or slightly broader compatibility.
Chrome 85+ (2020), Firefox 93+ (2021), Safari 16.4+ (March 2024), Edge 121+ (January 2024). Mobile: iOS 16.4+, Android Chrome 85+. That's 90%+ of users globally as of 2024, making AVIF production-ready for modern web projects.
Yes for file size: AVIF is 50% smaller than JPEG at the same perceived quality. AVIF also supports transparency (JPEG doesn't) and HDR (10/12-bit color). The trade-offs: AVIF has slower encoding and requires modern browsers. JPEG has 100% universal compatibility.
Smallest file sizes of any modern format, excellent quality-to-size ratio, transparency support, lossy and lossless modes in one format, HDR support (10/12-bit color), royalty-free, 90%+ browser support as of 2024. Perfect for modern web projects prioritizing performance and Core Web Vitals.
Add your AVIF file (or JPG/PNG/WebP to convert), choose a compression preset—Maximum Compression for smallest files, Lossless for perfect quality, Target Size for exact KB limits—then click Compress. Download individually or as a ZIP. Takes 3-5 seconds per file.
Both. AVIF supports lossy compression (smaller files, slight quality loss) and lossless compression (no quality loss, larger files). You choose the mode based on your needs. Lossy AVIF for photos, lossless AVIF for graphics and archival.
Yes—if the tool processes locally. We use browser-based WebAssembly; your files never leave your device. No upload to any server. Works offline after page loads. Open DevTools Network tab to verify—zero file uploads. Other tools require uploading, which is a privacy risk.
Yes. AVIF supports full 8-bit alpha channels (256 levels of transparency) in BOTH lossy and lossless modes. This is a major advantage—you can have lossy compression WITH transparency, something JPEG cannot do. AVIF even supports HDR alpha (10/12-bit) for future-proofing.
Recent format (2019) and Safari/Edge only added support in 2024. Before 2024, Safari holdout was a major barrier. Now with 90%+ browser support, adoption is growing rapidly. Slower encoding time (3-5x slower than JPEG/WebP) also slows adoption, but compression gains make it worth it for many use cases.
Ready to Compress Your AVIF Files?
Next-gen format, best-in-class compression. Up to 50 files at once, lossy or lossless modes, exact KB targets. Your images never leave your device.
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