Is this WEBP to AVIF converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple WEBP files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

Will the image quality change after conversion?

It depends on the formats involved. Converting to a lossless format like PNG preserves every pixel exactly. Converting to a lossy format like JPEG or WebP applies compression — we default to 85% quality, which looks identical to the original for almost all images. You won't notice a difference unless you zoom in pixel-by-pixel.

Do you support batch image conversion?

Yes — drop multiple images at once and they all convert in parallel. Free accounts handle up to 5 at a time; Pro is unlimited. Download everything as a single ZIP when you're done.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

WebP to AVIF Converter — Free, Smaller Files, No Upload

How to convert WEBP to AVIF online

1
Drop your WEBP file
Drag and drop your Web Picture Format file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Web Picture Format → AV1 Image File Format entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your AVIF
Your AV1 Image File Format file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

WEBP vs AVIF: format overview

WEBP

Web Picture Format

Google (On2 Technologies acquisition) · 2010

Compression: hybrid
Color depth: 8-bit
Transparency: Yes

✓ 30% smaller than JPEG, 26% smaller than PNG
✓ Supports both lossy and lossless
✗ Not supported in some older apps

AVIF

AV1 Image File Format

Alliance for Open Media · 2019

Compression: lossy
Color depth: 12-bit
Transparency: Yes

✓ Smallest file size of any image format (50% smaller than WebP)
✓ Excellent HDR and wide-gamut color support

WEBP magic bytes: 52 49 46 46 xx xx xx xx 57 45 42 50

AVIF magic bytes: 00 00 00 .. 66 74 79 70 61 76 69 66

Why convert WEBP to AVIF?

If you've ever tried to open a WEBP file and hit a wall — the app won't accept it, the website rejects it, or the preview just shows a broken icon — you already know why this conversion matters.

Web Picture Format is great for what it was designed for, but it has real-world limitations: not supported in some older apps and some photo editors lack native support. The moment you step outside that original context, it gets frustrating fast.

AV1 Image File Format is the safer choice for Modern web images, CDN optimization, High-DPI displays. Its main advantages — smallest file size of any image format (50% smaller than webp) and excellent hdr and wide-gamut color support — mean it just works wherever you need it.

A few common reasons people end up here: - Their target app, site, or device doesn't accept WEBP - They need a smaller file for email or upload (AVIF often compresses better) - They need AV1 Image File Format's specific capability: smallest file size of any image format (50% smaller than webp) - Compatibility with older software that pre-dates Web Picture Format

The conversion is one-way: you get a AVIF that works everywhere AV1 Image File Format is expected. The original WEBP file is not touched.

Quality & file size: WEBP to AVIF

Typical file sizes: WEBP 1–3 MB → AVIF 0.8–2 MB.

Both WEBP and AVIF use lossy compression. We transcode at high quality settings (equivalent to AVIF's recommended web quality) to minimize generational loss.

Color depth: WEBP supports 8-bit, AVIF supports 12-bit.

Transparency: WEBP supports transparency. AVIF preserves transparency.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your WEBPfiles are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.