png → webp

Convert PNG to WebP in your browser

Convert PNG files to WebP in your browser. PNG is a lossless raster format built for crisp edges, transparency and UI artwork. It is a dependable choice for logos, screenshots and graphics that need exact pixel fidelity, even when the file is a little heavier. WebP is a modern image format from Google that combines efficient compression with broad browser support. It can deliver smaller files than JPEG or PNG for many visuals, making it a strong default for performance-focused publishing. Local Optimizer keeps the process local, fast and private with no uploads.

🔒

Privacy first, by design

No upload

Files are processed locally in your browser and never sent to a server.

Private and GDPR-friendly

Nothing leaves your device, and the site is built to minimize data collection.

Fast and offline-ready

Once loaded, the converter keeps working even without a network connection.

Drag & drop your files here

or click to browse your folders

JPEG, PNG, WebP, GIF, BMP and SVG

Browse files

PNG is a practical choice when you want to keep the source assets familiar. PNG is a lossless raster format built for crisp edges, transparency and UI artwork. It is a dependable choice for logos, screenshots and graphics that need exact pixel fidelity, even when the file is a little heavier. WebP brings a different balance of size, compatibility or flexibility. WebP is a modern image format from Google that combines efficient compression with broad browser support. It can deliver smaller files than JPEG or PNG for many visuals, making it a strong default for performance-focused publishing.

Use Local Optimizer to convert PNG to WebP locally, without uploading the file anywhere. The converter below works well for one-off jobs and batch workflows alike.

Unlike classic online tools, Local Optimizer processes your files directly in your browser using the HTML5 Canvas API. Your images are never uploaded to a server: that means total privacy and maximum speed, since processing does not depend on your internet connection. You can even use the tool offline once the page has loaded.

Frequently asked questions

Why use a local image compressor?⌄

Which formats are supported?⌄

Local Optimizer accepts JPEG, PNG and WebP images as input, as well as SVG vector files. Images can be converted to JPEG, PNG or WebP with a quality setting from 10% to 100%. SVG files are minified: comments, editor metadata and unnecessary whitespace are removed without changing the visual output.

Does compression degrade my images?⌄

JPEG and WebP use lossy compression: the lower the quality you pick, the smaller the file, at the cost of visual detail. A quality of 75–85% usually offers an excellent trade-off that is often imperceptible to the naked eye. PNG remains lossless. Try several settings: the comparison table instantly shows how much space you saved.

Is there a limit on file size or count?⌄

No server-imposed limits, because there is no server! The only limit is your device's memory. You can process several files at once and download them individually or as a single ZIP archive.