Solution
Convert to WebP — completely without an upload
WebP delivers strong compression for photos and UI graphics. ConV builds WebP files locally using WebAssembly codecs, parallelized across Web Workers.
That makes the workflow a fit for security-conscious teams that do not want to hand image bytes to third-party APIs.
Batch conversion with per-image quality controls and ZIP export keeps the workflow efficient for large sets.
Key benefits
- Converts JPEG, PNG, AVIF to WebP in the browser
- Uses libwebp compiled to WebAssembly for native-quality output
- No filenames or pixel data sent to any external server
- Batch convert dozens of images at once
Common use cases
- Frontend developers preparing WebP assets for web projects
- Designers exporting images for CMS upload
- Agencies converting client image sets under NDA
- E-commerce teams preparing WebP product images
How it works
- 01
Drop JPEG, PNG, or AVIF files into the tool
- 02
Select WebP as output format and set quality
- 03
Workers convert files in parallel using libwebp WASM
- 04
Download all WebP files as a ZIP
Limitations and realistic expectations
Animated WebP from video sources is not supported. Very large source files may be slow depending on device hardware.
Frequently asked questions
Which input formats can I convert to WebP?
JPEG, PNG, and AVIF are supported as inputs for WebP conversion.
Is WebP conversion lossless or lossy?
You can configure the quality level. Lower quality = smaller file; 100 = near-lossless.
Are my images uploaded during conversion?
No. All conversion runs in your browser using WebAssembly. Nothing is sent to a server.
Does WebP have broad browser support?
Yes. All modern browsers support WebP. For very old browser targets, provide JPEG fallbacks.
Related solutions
Create AVIF — in your own browser, the privacy-friendly way
AVIF often saves even more bytes than WebP. Encoding is CPU-heavy — ConV uses Web Workers to keep the UI responsive while encoding runs in parallel.
Compress multiple images locally and export them as ZIP
Processing images one at a time is impractical for agencies, content teams, and e-commerce workflows. ConV's batch mode handles dozens of images in a single session with parallel encoding and ZIP export.
No-upload image optimizer for private workflows
Most image optimizers send your files to a remote server. ConV takes a different approach: the entire compression pipeline runs inside your browser using WebAssembly.