What is the maximum file size?

3 MB. This is set by the Vercel free tier request body limit. For larger images, use the API with a self-hosted instance — there is no size cap when self-hosted.

Does conversion affect image quality?

Lossless formats (PNG, TIFF) preserve every pixel exactly. Lossy formats (JPEG, WebP, AVIF) reduce file size by discarding perceptually insignificant detail. The quality slider controls this trade-off: 80 is a good default for web images, 90+ for print-quality exports, and 60–70 for thumbnails where small file size matters more than sharpness.

Why convert to WebP or AVIF?

WebP is 25–35% smaller than JPEG/PNG at equivalent quality and is supported by all modern browsers. AVIF is 50% smaller still but takes longer to encode and decode. Both formats support alpha transparency. Converting your images to WebP or AVIF before serving them from a website reduces page load times and bandwidth costs significantly.

Does PNG to WebP conversion lose transparency?

No. WebP supports full alpha channel transparency. Converting a PNG with a transparent background to WebP preserves the transparency. AVIF also supports alpha transparency. JPEG does not — converting a transparent PNG to JPEG replaces the transparent areas with white.

Can I convert SVG to PNG or JPEG?

Yes. SVG is accepted as an input format and can be rasterised (converted from vector to pixels) to any of the supported output formats. The output resolution depends on the SVG's viewBox and the browser's rendering. For high-resolution exports, use the API with a custom width parameter.

What quality setting should I use?

For JPEG: 85 for general use, 70 for thumbnails, 95 for high quality. For WebP: 80 for general use, 60–70 for thumbnails. For AVIF: 70 for general use (AVIF's perceived quality is higher than JPEG at the same numeric value). For lossless PNG and TIFF, quality is ignored.

Is it safe to convert WebP to AVIF in the browser?

Yes. The conversion runs entirely in your browser using the Canvas API — your images are not uploaded to any server. No data leaves your device.

Does converting WebP to AVIF reduce quality?

Converting to AVIF uses lossy compression, so some quality reduction is possible. The tool uses high-quality settings by default. For archival use, keep the original WebP file.

Can I convert multiple files at once?

The web UI supports multiple files at once — drag and drop a batch of WebP images and download them all as AVIF. The REST API also accepts individual files for automated batch workflows.

How do I convert WebP to AVIF without software?

Use this tool — no installation required. Drag your WebP file onto the converter, select AVIF as the output format, and click Convert. The result downloads automatically.

WebP to AVIF Converter

Convert WebP images to AVIF format free, in your browser — no upload, no sign-up.

Why convert WebP to AVIF?

Converting WebP to AVIF lets you use the image in contexts that require the AVIF format, whether for compatibility, file-size, or workflow reasons.

–Web optimisation — replace WebP assets on your website with AVIF to improve page load speed and Core Web Vitals scores.
–Batch conversion of WebP files in a CI pipeline using the REST API: POST /api/image-converter.
–Quick one-off conversion without installing software — everything runs in your browser.

About WebP and AVIF

WebP (source)

WebP is a modern format developed by Google. It is 25–35% smaller than JPEG or PNG at equivalent quality and is supported by all modern browsers.

AVIF (output)

AVIF is based on the AV1 video codec and achieves up to 50% better compression than JPEG. It is supported by Chrome, Firefox, and Safari.

Quality note: Both formats use lossy compression. Converting between them introduces a second round of compression, which can slightly reduce quality. Where possible, convert from the original lossless source rather than from a previously compressed file.

How to convert WebP to AVIF

1.Drag your WebP file (or files) onto the converter above, or click to browse.
2.Confirm the output format is set to AVIF. Adjust quality or size options if needed.
3.Click Convert. The conversion runs in your browser — your images are never uploaded.
4.Download the AVIF file. For multiple files, a ZIP is downloaded automatically.

Frequently asked questions

Is it safe to convert WebP to AVIF in the browser?: Yes. The conversion runs entirely in your browser using the Canvas API — your images are not uploaded to any server. No data leaves your device.
Does converting WebP to AVIF reduce quality?: Converting to AVIF uses lossy compression, so some quality reduction is possible. The tool uses high-quality settings by default. For archival use, keep the original WebP file.
Can I convert multiple files at once?: The web UI supports multiple files at once — drag and drop a batch of WebP images and download them all as AVIF. The REST API also accepts individual files for automated batch workflows.
How do I convert WebP to AVIF without software?: Use this tool — no installation required. Drag your WebP file onto the converter, select AVIF as the output format, and click Convert. The result downloads automatically.

Other WebP conversions

WebP → PNG WebP → JPEG WebP → TIFF WebP → GIF