PNG to WebP Converter
Convert PNG images to WebP format free, in your browser — no upload, no sign-up.
Image Converter
Convert images between PNG, JPEG, WebP, AVIF, TIFF, GIF, and SVG formats
What is this?
Image Converter is a free, browser-based tool that converts image files between popular formats — PNG, JPEG, WebP, AVIF, TIFF, and GIF. SVG files can also be rasterised to any of those formats. No software to install and no sign-up required.
How to use
- Upload: Click the file picker and select your image (up to 3 MB).
- Choose formats: Select the source format and your desired output format, then adjust quality if needed.
- Convert & download: Click Run. A preview appears immediately and you can download the converted file.
FAQ
- What is the maximum file size?
- 3 MB. This is set by the Vercel free tier request body limit. For larger images, clone the repo and run locally — there is no size cap when self-hosted.
- Does conversion affect image quality?
- Lossless formats (PNG, TIFF) preserve every pixel. Lossy formats (JPEG, WebP, AVIF) use the quality slider — 80 is a good default that balances file size and visual fidelity.
- 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. Both are great for web delivery.
Why convert PNG to WebP?
WebP files are typically 50–80% smaller than PNG, making them faster to transfer and cheaper to store. Converting from PNG (lossless) to WebP (lossy) is a common way to reduce file size when pixel-perfect quality is not needed.
- –Web optimisation — replace PNG assets on your website with WebP to improve page load speed and Core Web Vitals scores.
- –Batch conversion of PNG 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 PNG and WebP
PNG is a lossless raster format that supports transparency. Ideal for graphics, logos, and screenshots where pixel-perfect quality matters.
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.
Quality note: PNG is lossless; WebP is lossy. The conversion is irreversible — once you save as WebP, the original pixel data cannot be recovered. For archival purposes, keep a copy of the original PNG.
How to convert PNG to WebP
- 1.Drag your PNG file (or files) onto the converter above, or click to browse.
- 2.Confirm the output format is set to WebP. Adjust quality or size options if needed.
- 3.Click Convert. The conversion runs in your browser — your images are never uploaded.
- 4.Download the WebP file. For multiple files, a ZIP is downloaded automatically.
Frequently asked questions
- Is it safe to convert PNG to WebP 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 PNG to WebP reduce quality?
- Converting to WebP uses lossy compression, so some quality reduction is possible. The tool uses high-quality settings by default. For archival use, keep the original PNG file.
- Can I convert multiple files at once?
- The web UI supports multiple files at once — drag and drop a batch of PNG images and download them all as WebP. The REST API also accepts individual files for automated batch workflows.
- How do I convert PNG to WebP without software?
- Use this tool — no installation required. Drag your PNG file onto the converter, select WebP as the output format, and click Convert. The result downloads automatically.