FreeNo uploadNo sign-upBatch
WebP Converter
Lighter images for the web, or WebP files that open in every app.
Drop files here
batch and mixed formats welcome
Background for transparency
SVG size
Resolution
Split
Compression
Pages are re-saved as optimised images, so text will no longer be selectable.
Add PDFs and images in any order, then use the arrows to arrange them.
LosslessPNG keeps every pixel. Transparency is preserved.
Icon sizes
Page size
- Private by design. Converted inside your browser.
- Instant. No upload queue, no waiting.
- Unlimited. Convert hundreds of files, download as ZIP.
WebP makes website images 25–35% smaller than JPG or PNG. Converting to WebP is one of the easiest page-speed wins.
If a WebP will not open in your editor or upload form, convert it to JPG or PNG.
Convert other files to WebP
Convert WebP to other formats
Frequently asked questions
Are my files uploaded to a server?
No. formatmath converts files with code that runs inside your browser. Your files are never uploaded, stored or seen by us.
Is it free?
Yes. There is no watermark and no daily limit. An account is optional and only keeps a history of your conversions.