PageSpeed Insights keeps flagging “Serve images in next-gen formats” and pointing at your JPGs. The fix is WebP: the same photo, typically 25–35% smaller at matching visual quality, and supported by every current browser.
This converter turns JPG files into WebP inside your browser, with a quality slider so you decide the trade-off between size and detail. No upload, no plugin, no command line.
It is aimed at people who manage a site by hand — a WordPress blog, a Shopify store, a hand-coded portfolio — and don't want to install an optimization plugin that phones home or charges per image. Convert the batch here, upload the WebP files, and the Lighthouse warning for those images goes away.
In Chrome, Edge and Firefox the encoding is done by libwebp — the same library behind Google's cwebp command-line tool — so you get production-grade WebP files without opening a terminal or installing anything. Each result lists its new size, which makes it easy to report the saving to a client or teammate.
How It Works
- Load your JPGs — drop a single image or a batch of up to 50. Only JPEG files are accepted on this page.
- Set quality — the default is 82%, a common choice for web photos. The browser decodes each JPG to a canvas, keeping its exact dimensions.
- Encode to WebP — your browser's built-in WebP encoder (libwebp in Chrome, Edge and Firefox) compresses each canvas. Download files one at a time or as a ZIP.
Compatibility & Support
Supported Input → Output Formats
- Input: .jpg / .jpeg photos and graphics
- Output: lossy .webp at 40–100% quality, same pixel size
- Creating WebP works in: Chrome, Edge, Firefox, Opera and Samsung Internet. Safari displays WebP but may not be able to create it — the tool checks first
Unsupported Formats
Some Safari versions can display WebP but cannot create it — the tool detects this and tells you to switch browsers rather than producing a broken file. Animated GIFs are not handled here. For PNGs with transparency use PNG to WebP.
File Size Limits
Up to 50 images per batch and 60 MB per image. The real ceiling is your device's memory: a browser canvas tops out around 50 megapixels, so a 12,000 × 9,000 px panorama may fail on a phone even though it works on a laptop.
Who Should Use This Tool?
- Students: A student building a portfolio site on GitHub Pages converts project photos to WebP to keep the repository small and pages fast on campus Wi-Fi.
- Freelancers & Designers: A WordPress freelancer converts a client's 40-image gallery to WebP before upload, cutting several megabytes from the page without touching a plugin.
- Office Professionals: A marketing coordinator preparing product photos for a Shopify store converts them to WebP to improve mobile load times.
- Developers: A developer fixing a Lighthouse warning converts hero images locally and compares sizes before swapping them into a
<picture>element.
Key Features / Khusoosiyat
Here's what separates this tool from generic alternatives:
Smaller Files
Lossy WebP is typically 25–35% smaller than JPEG at similar visual quality.
Quality Control
Tune from 40% to 100%; 75–85% suits most web photos.
Batch + ZIP
Convert up to 50 photos at once and download a single archive.
Local Processing
Images are encoded by your browser, never uploaded.
Honest Detection
If your browser can't encode WebP, you're told instead of getting a corrupt file.
Same Dimensions
No resizing or cropping — only the format changes.
Why This Tool Beats the Alternatives
- No server round trip: large batches don't wait in an upload queue.
- Free batch conversion without an account or credits system.
- Adjustable quality rather than a single “optimized” preset you can't control.
- No watermark or tracking metadata added to your images.
- Clear compatibility messaging for Safari users.
Pro Tips
- Keep your original JPGs. Serve WebP to browsers and keep JPEG as the fallback inside a
<picture>tag if you support very old devices. - Resize first, then convert: a 4000 px photo displayed at 1200 px wastes far more bytes than format choice saves. Use the Image Resizer.
- Compare at 100% zoom around faces, skies and fine textures when lowering quality below 75% — banding in gradients is the first sign you have gone too far.
Drop your JPG photos above and download web-ready WebP versions in seconds.