About this tool
AVIF Converter, Convert Images to AVIF Format Free Online
AVIF is the most efficient image format available today, delivering roughly 50 % smaller files than JPEG and 20–30 % smaller than WebP at the same visual quality. OmegaPix converts JPEG, PNG, and WebP images to AVIF, and converts AVIF back to any other format, entirely in your browser. No uploads, no account, and full privacy: your files never leave your device.
Why use OmegaPix
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Best compression of any web format : AVIF achieves ~50 % smaller files than JPEG and ~20–30 % smaller than WebP at equivalent visual quality. For image-heavy pages, this is a meaningful LCP and bandwidth improvement.
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Full alpha transparency and HDR support : AVIF supports alpha channels (like WebP and PNG) and HDR colour spaces that older formats cannot encode. Future-proof format for displays that support wide colour gamut.
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Convert AVIF back to JPEG, PNG, or WebP : OmegaPix accepts AVIF as input too. Convert AVIF files back to more compatible formats for platforms or tools that do not yet support AVIF.
How it works
Add your images
Drag JPEG, PNG, WebP, or existing AVIF files onto OmegaPix. Any combination of source formats works in a single batch.
Select AVIF output
Choose AVIF as the output format. Auto quality finds the ideal compression ratio. Manual quality lets you set a level from 10 to 100.
Download AVIF files
See the file size reduction for each image versus the original. Download individually or export all as a ZIP archive.
Frequently asked questions
What is AVIF and how does it compare to WebP?
AVIF (AV1 Image File Format) is based on the open-source AV1 video codec. It achieves better compression efficiency than WebP through more advanced prediction and entropy coding. The trade-off is higher CPU cost during encoding, OmegaPix handles this asynchronously in Web Worker threads so the UI stays responsive.
Which browsers support AVIF?
AVIF is supported in Chrome 85+, Firefox 93+, Edge 121+, and Safari 16.4+. As of 2026, it covers approximately 90 % of global browser usage. For the widest compatibility, serve AVIF with a JPEG or WebP fallback via the HTML picture element.
Can I convert AVIF back to JPEG or PNG?
Yes. OmegaPix accepts AVIF as a source format. Drop your AVIF files and select JPEG, PNG, or WebP as the output to convert back to a more universally supported format.
Does AVIF support transparency?
Yes. AVIF supports full alpha channel transparency. OmegaPix preserves transparency when converting from transparent PNG or WebP sources to AVIF.
Why does AVIF conversion take longer than WebP?
AVIF encoding uses more computationally intensive algorithms than WebP to achieve its higher compression. OmegaPix runs encoding in a Web Worker pool to keep the UI responsive, but expect AVIF to take roughly 2–5× longer than WebP for the same file.
Is AVIF good for Core Web Vitals and SEO?
Yes. Smaller image files directly reduce Largest Contentful Paint (LCP), a Core Web Vitals metric Google factors into rankings. AVIF's superior compression can measurably improve LCP scores compared to JPEG or WebP, particularly on image-heavy pages.
Should I use AVIF or WebP in 2026?
WebP is the safer default, 97 %+ browser support and good compression. AVIF offers better compression (~20–30 % over WebP) but has ~90 % browser support. If your audience is on modern browsers (confirmed via analytics), AVIF is worth adopting for key images. Use picture element with fallback for the remaining 10 %.
Can AVIF replace JPEG for all web images?
For your own website, yes, serve AVIF with a JPEG or WebP fallback via the picture element. For images uploaded to social media or third-party platforms, check their format support first. Many platforms transcode uploaded images anyway, so the original format matters less there.
Does converting to AVIF affect image colours?
At quality 80 and above, colour reproduction is visually indistinguishable from the source. At very low quality settings (below 40), AVIF can exhibit blockiness in gradients. Use Auto quality or Manual quality 70+ for standard web images.
How does OmegaPix convert images to AVIF without uploading?
OmegaPix uses libaom (the AV1 reference encoder) compiled to WebAssembly. The encoder runs in a dedicated Web Worker thread on your own CPU. Your files are not transmitted to any server at any point during the conversion.
When to use this tool
Use AVIF when compression is the priority
AVIF makes the biggest difference on image-heavy pages and e-commerce product galleries where loading speed directly affects conversion rates.
Provide JPEG or WebP fallbacks for older browsers
AVIF has ~90 % browser support in 2026, not universal. Use the HTML picture element with an AVIF source and a JPEG or WebP fallback for maximum compatibility.
Avoid AVIF for real-time or batch-intensive workflows
AVIF encoding is 2–5× slower than WebP per file. For workflows requiring fast batch processing on large volumes, WebP is more practical. Use AVIF for key images where size matters most.
When not to use this tool
Email and document workflows
Most email clients and PDF readers do not handle AVIF in 2026. For attachments and embedded PDF images, JPEG remains the universal choice.
High-throughput server pipelines
AVIF encoder takes 5–10× longer than JPEG. For server-side processing of millions of images, the CPU cost can outweigh the bandwidth savings.
Pre-2018 browsers
AVIF works in every modern browser, but very old enterprise installations may not render it. Keep a WebP or JPEG fallback for that audience.
Technical details
Why AVIF compresses so well
AVIF is derived from the AV1 video codec, a state-of-the-art compression algorithm developed by Google, Netflix, Apple, and others through the Alliance for Open Media. AV1 brings advanced techniques like overlapped block motion compensation, restoration filters, and CDEF deringing. All adapted for still images in AVIF. The result: roughly 40-50% smaller than JPEG, 25-30% smaller than WebP, at the same visual quality.
The encoder speed trade-off
AVIF's big drawback is encode time. The libaom encoder explores many compression options to find the smallest output, which takes time. On a modern laptop, a 4032×3024 photo takes 3-5 seconds to encode as AVIF, versus ~200ms for JPEG. OmegaPix uses libaom in fast mode (cpu-used=6) to keep batches usable; even so, expect AVIF to feel noticeably slower than JPEG/WebP.
Browser support is universal in 2026
AVIF works in Chrome 85+ (Aug 2020), Firefox 93+ (Oct 2021), Safari 16.4+ (Mar 2023), Edge 121+ (Jan 2024), Samsung Internet 14+. Combined global coverage is 97%+ via caniuse. The "Safari doesn't support AVIF" objection is three years out of date.
Real numbers
A 4000×3000 photograph at visually-equivalent quality: JPEG q85 = 1.8 MB. WebP q80 = 1.2 MB (-33%). AVIF q60 = 720 KB (-60%). AVIF q70 = 920 KB (matches JPEG q90 quality). A 1080×1080 graphic with transparency: PNG-32 220 KB → WebP lossless 140 KB → AVIF lossless 120 KB.
When the bandwidth savings justify the encode time
For sites serving > 100 GB/month of images, AVIF's 50% reduction typically pays back in a single month of CDN savings. For low-traffic sites, the encoder time is a wash. The break-even is roughly $100/month in image bandwidth, above that, switch.
Your files stay on your device
AVIF encoding uses libaom compiled to WebAssembly. The same encoder Google and Netflix use internally, but running locally in your browser. Your images are not uploaded for the conversion. Open DevTools → Network during encoding: zero outgoing requests carry image bytes.