Bulk WebP to AVIF Converter
Upgrade your WebP images to AVIF. The next-generation format backed by Google, Apple, Netflix, and Mozilla. Get 20–30% smaller files than WebP at the same visual quality, with full transparency support and HDR-ready color.
Your images
0 images addedConvert WebP to AVIF in 3 Steps
No account, no install, no queue. Drop your WebP files in and the AVIF versions are ready to download.
- Step 1
Drop your images in
Drag files onto the page, click to browse, or drop in a ZIP and every supported image inside is pulled out. JPG, PNG, WebP, AVIF, HEIC, GIF and BMP all work, mixed together in the same batch.
- Step 2
Adjust if you want to
Choose your output format and drag the quality slider. That is the whole setup. Settings holds a KB target, resizing and batch renaming if you want them, and can stay closed if you do not.
- Step 3
Download your AVIF files
Conversion starts on its own, so there is usually nothing to press. Batches over 40 wait for one click so nothing runs away with your machine. Download files one at a time or take the whole batch as a single ZIP.
Why Convert WebP to AVIF?
WebP was a major leap forward from JPEG, but AVIF takes things further. Developed by an alliance including Google, Apple, Netflix, and Mozilla, AVIF delivers 20–30% smaller file sizes than WebP at the same visual quality. If you're serving images at scale, that difference means real bandwidth savings and faster page loads. AVIF also retains full transparency support and adds HDR and wide color gamut capabilities that WebP doesn't have.
WebP Image Format
WebP is Google's modern web format. A significant improvement over JPEG and PNG for most use cases. It's widely supported in browsers and handles both lossy and lossless compression with transparency. But with AVIF now broadly supported across Chrome, Firefox, Safari, and Edge, WebP's size advantage has been surpassed by a newer generation.
AV1 Image File Format
AVIF is the image container format built on the AV1 video codec. The same technology powering high-efficiency streaming on Netflix and YouTube. It achieves compression ratios that beat both JPEG and WebP, with better quality retention at low settings. It's the format major browsers have committed to, and it's the best choice for modern web delivery.
Next-Gen Compression. Zero Compromise.
AVIF is the most efficient image format available for web delivery. SmallerImages gives you the tools to convert your entire WebP library in one batch.
True Bulk Conversion
Convert 10 or 500+ WebP files to AVIF in one batch. No file limits, no throttling, no queues.
100% Private & Secure
Client-side only. Nothing is uploaded to any server. Your images never leave your device, ever.
Adjustable Quality Control
AVIF delivers exceptional quality at settings where other formats fall apart. Quality 70–85 is the sweet spot. Use the before/after slider to verify before downloading.
ZIP Upload & Download
Upload a ZIP of WebP files. Download all converted AVIF files as a single ZIP. Perfect for bulk site asset updates.
Batch File Renaming
Custom prefix, separator, numbering, and.avif extension. Preview exactly what your filenames will look like before downloading.
the maximum size option
Need AVIF files under 100 KB for your CDN budget? Set a target KB and the tool automatically finds the optimal quality setting for each image.
Works on Every Device
Windows, Mac, Linux, Chromebook, iPhone, Android. Runs in any modern browser. No extension or app required.
Selective Processing
Upload 200 WebP files, select only the 30 you need converted. Only those are processed. Full control over every batch.
Browser Fallback Ready
Serve AVIF to modern browsers with WebP or JPEG fallbacks for older ones. Generate your full set of assets in bulk across all our converters.
AVIF vs WebP vs JPEG
How do the three dominant web image formats actually compare? Here's what the data shows.
| Feature | AVIF | WebP | JPEG |
|---|---|---|---|
| File size vs JPEG baseline | 50% smaller | 25–34% smaller | Baseline |
| Transparency (alpha) | Yes | Yes | No |
| HDR & wide color gamut | Yes | No | No |
| Browser support (2024+) | Chrome, Firefox, Safari, Edge | All modern browsers | Universal |
| Quality at low settings | Excellent | Good | Acceptable |
| Email client support | Limited | Limited | Universal |
| Print service support | No | No | Universal |
| Encoding speed | Slower | Fast | Very fast |
| Best use case | Modern web delivery | Web delivery | Email, print, legacy |
When You Need WebP to AVIF
If WebP is already your baseline, converting to AVIF is the next logical step toward faster, leaner web delivery.
Reducing CDN Bandwidth Costs
If you're serving thousands of images through a CDN, switching from WebP to AVIF can reduce image bandwidth by 20–30%. At scale, that's a meaningful cost reduction on monthly CDN bills.
Core Web Vitals Optimization
Largest Contentful Paint (LCP) is directly tied to image size. Converting hero images and product shots from WebP to AVIF can meaningfully improve LCP scores. Especially on mobile connections.
E-Commerce Product Image Libraries
Product galleries with hundreds of images see compounding benefits from AVIF compression. Smaller product images mean faster browsing, better mobile experience, and reduced server storage costs.
Photo Portfolios & Media Sites
Photographers and media publishers serving large galleries benefit enormously from AVIF's superior quality-to-size ratio. Visitors get sharper images that load faster, especially on high-DPI displays.
Building Multi-Format Asset Pipelines
Modern best practice is to serve AVIF as the primary format with WebP and JPEG fallbacks for older browsers. Use this tool to generate the AVIF layer of your asset stack.
Upgrading Existing WebP Image Archives
If you already made the switch from JPEG to WebP a few years ago, now is a good time to convert those WebP archives to AVIF. Browser support has reached a level where AVIF is a safe default for nearly all web users.
Trusted for WebP to AVIF Conversion
Real feedback from people converting WebP to AVIF every week, from teams in the UK, US, India, Japan, Pakistan, the UAE and beyond.
The batch handling is the reason I keep this bookmarked. 150 WebP images to AVIF in one pass, with a progress bar that actually tells you which file it is on. Most converters choke well before that.
ZIP in, ZIP out. That is the whole workflow for me. It even skips the non-image files in the archive without complaining, which I did not expect.
I keep this open in a pinned tab. It loads instantly and the conversion is done before I have finished switching windows.
Genuinely no ads, no watermark, no daily cap. I kept waiting for the catch and there isn't one. I have converted a few thousand WebP files at this point.
Coming from WebP, the thing you notice immediately is the size difference. AVIF gives me the best compression available today and my page weight dropped noticeably after the swap.
The thing that sold me is that there is no upload. I opened devtools, converted twenty WebP files to AVIF, and watched the network panel stay empty. That is a real privacy claim, not marketing copy.
We had an Imagify plan on the team budget purely for image conversion. This replaced it for the WebP and AVIF work, which is most of what we were doing. Small win, but it adds up.
Set the target file size to what my CMS allows and it found the best quality that fits. That one feature has saved me more time than everything else combined. No more converting, checking, adjusting, converting again.
My team is split across Windows, Mac and a couple of Chromebooks. This is the only image tool all of them can actually use.
The batch renaming is a small thing that saves a lot of tedium. Prefix, separator, starting number, and the whole AVIF batch comes out named properly for the CMS instead of DSC_0481.
Cut about 60% off our image payload converting WebP to AVIF. No visible difference to customers, measurably faster pages.
I had just over 300 WebP files from a product shoot that all needed to be AVIF. Dropped the lot in, walked away, came back to a finished batch. No queue, no "upgrade to convert more than 20 files" wall.
WebP to AVIF Conversion and Compression Explained
What changes when you convert WebP to AVIF, what it costs, and how to pick a quality setting you will not regret.
WebP is the right default for images served over the web, and the wrong one the moment a file has to leave the browser. Design tools, print shops, older content management systems and plenty of desktop software still refuse it. Converting to AVIF gives you a copy that behaves predictably outside the browser.
Both formats are lossy, so the conversion re-encodes rather than copies. Keep quality at 85 or above if the file is going to be edited again, and use the before and after slider to check the first image of a batch before you commit to the rest.
Set quality once and it applies to the whole batch, so a folder of two hundred files takes the same number of decisions as one. AVIF encoding is genuinely slower than the alternatives, so a large batch takes minutes rather than seconds. It runs on your own processor, which is why it is not instant, and also why nothing is queued behind other people's jobs. If you are working to a hard limit, such as a content management system that rejects anything over 200 KB, open Settings and set a maximum file size instead of a quality percentage. The encoder then searches for the best quality that fits your budget, file by file.
All Formats. One Tool.
WebP to AVIF is one of twenty-four conversion paths here, and each one has its own page with defaults already set for that pair. Whichever you land on, the tool behind it is the same: it accepts JPG, PNG, WebP, AVIF, HEIC, GIF and BMP, reads ZIP archives, and handles up to 500 images in a single batch.
Conversion runs in your browser using your own processor, so nothing is uploaded, nothing is queued behind other people, and there is no account, no watermark and no daily cap. Close the tab and the files are gone from memory; they were never anywhere else.
If you need a smaller file rather than a different format, the image compressor keeps your originals and works to a quality level or a size in kilobytes. To change dimensions, the image resizer handles fit, fill and crop, or stretch across a whole folder at once.
Frequently Asked Questions
Quick answers about converting WebP to AVIF.
Is it safe to convert WebP to AVIF on SmallerImages?
Does AVIF support transparency like WebP?
How much smaller will AVIF files be compared to my WebP files?
What quality setting should I use for AVIF?
Which browsers support AVIF?
Why is AVIF encoding slower than WebP?
How many files can I convert at once?
Is SmallerImages completely free?
Can I upload a ZIP of WebP files?
What if I need to go back from AVIF to WebP?
WebP Was the Future. AVIF Is the Present.
Browser support has crossed the threshold. AVIF is now the smartest default for web image delivery. Smaller files, better quality, full transparency. Convert your WebP library for free, right now, without uploading anything.
Convert WebP to AVIF Now