About Picspresso
A free, fast, private WebP converter — made in 2026.
What it is
Picspresso is a single-page web tool that converts JPG, PNG, GIF, and other common image formats to WebP. It runs entirely in your browser. No account. No upload. No watermark. No file-size cap beyond what your browser can handle.
Why we built it
Every other WebP converter we tried either uploaded files to a server, slapped a watermark on the output, capped batch size, or shoved ads in the workflow. None of that is necessary — modern browsers can do the conversion natively via the Canvas API. So we built the version we wanted to use.
How it works
When you drop an image into Picspresso, the file stays on your device. The browser decodes it, draws it to an offscreen canvas at the resolution and quality you chose, then re-encodes it as WebP via canvas.toBlob('image/webp', quality). For bulk downloads we package everything into a ZIP using JSZip — still locally. The server never sees a single pixel.
What we don't do
- Upload your images anywhere
- Track what you convert
- Set tracking cookies
- Sell or share data
- Require an account
- Add watermarks or quality limits
Who's behind it
Picspresso is built and maintained by Justin Productions, a one-person studio focused on shipping small, useful, privacy-respecting web tools. If you have feedback, feature requests, or find a bug, the feedback button on the homepage goes straight to the inbox.
Tech stack
Next.js 16 (App Router), TypeScript, React 19, Tailwind CSS. Hosted on Vercel. Image conversion via Canvas API. Bulk packaging via JSZip. Feedback storage via Turso (libSQL). That's the whole list.