How it works
Drop images
Drop JPG, PNG, GIF, BMP or HEIC files — one or many. Everything stays on your device.
Pick quality
Use the slider or a preset. 80% is visually identical to the original for most photos.
Convert instantly
Every image processes in your browser — no upload wait, no queue, no size limit.
Download
Grab files individually or as a single ZIP archive with original filenames preserved.
Converting to WebP in code
The same conversion, done in your own build pipeline — here are the standard commands:
Why convert images to WebP? The web speed win
WebP is a modern image format from Google that delivers 25-35% smaller file sizes than JPEG and up to 26% smaller than PNG at the same visual quality. Smaller images mean faster page loads, better Core Web Vitals scores (specifically LCP — Largest Contentful Paint), higher Google rankings, and less mobile bandwidth used. Since 96%+ of browsers now support WebP, it's the highest-impact single change most websites can make for SEO.
Every feature this WebP converter includes
Most WebP tools online do one thing: single-file conversion at a fixed quality. This tool matches what paid services like Cloudinary and Elementor offer, entirely free:
- 1Batch conversion — drop 10, 50, or 500 images together and every file processes in parallel. No one-by-one workflow.
- 2Quality slider (1-100) with a live size preview so you can see the file-size trade-off before you commit.
- 3Lossy and lossless modes — lossy for photos (best size savings), lossless for logos and graphics where every pixel matters.
- 4Transparency preserved — PNGs with transparent backgrounds convert cleanly; no white matte added, alpha channel intact.
- 5ZIP download for batches — grab all converted files in a single archive with original filenames.
- 6Side-by-side comparison — see original vs WebP size for each image with % saved highlighted.
- 7100% browser-based — no uploads, no signup, no watermark. Safe for confidential and client work.
Lossy vs Lossless WebP — which mode to pick
🖼️ Lossy WebP (default)
- Best for: photos, hero images, product photography, blog images
- File size: 25-35% smaller than JPEG at 80% quality
- Quality: visually identical for typical viewing distances
- Recommended quality: 80 (default), 70 for thumbnails
- Analogous to: JPEG compression
🎨 Lossless WebP
- Best for: logos, icons, screenshots, graphics with text
- File size: 25-26% smaller than PNG
- Quality: every pixel identical to the original
- Slower to encode but perfect fidelity
- Analogous to: PNG compression
WebP browser support in 2026
| Browser | WebP support since |
|---|---|
| Chrome | Version 32 (2014) |
| Firefox | Version 65 (2019) |
| Edge | Version 18 (2018) |
| Safari | Version 14 (2020) — macOS Big Sur and iOS 14+ |
| Opera | Version 19 (2014) |
| Samsung Internet | Version 4 (2016) |
Overall browser support: 96.7% of global users. For remaining older browsers, use the HTML <picture> element with a JPG or PNG fallback.
Recommended quality settings for common use cases
- 1Hero images and product photography: quality 85-90. Larger file, but essential detail where it matters most.
- 2Blog post images: quality 80 (default). The sweet spot — 25% smaller than the original with no perceivable quality loss.
- 3Thumbnails and preview images: quality 70-75. Small display size hides minor compression artifacts.
- 4Background images and non-critical decor: quality 60-65. Maximum file-size reduction where quality is least noticed.
- 5Logos, icons, screenshots with text: lossless mode. Every pixel preserved, but files are still smaller than PNG.
Serving WebP on your website — the picture element
For maximum browser compatibility, serve WebP with a fallback:
<picture> <source srcset="hero.webp" type="image/webp"> <img src="hero.jpg" alt="Description"> </picture>
Browsers that support WebP will use the smaller version; older browsers fall back to JPG. Zero JavaScript required.
Frequently asked questions
What is WebP and why should I use it?
WebP is a modern image format developed by Google that offers 25-35% smaller file sizes than JPEG and up to 26% smaller than PNG at the same visual quality. Smaller files mean faster page loads, better Core Web Vitals, higher Google rankings, and less bandwidth used. Over 96% of browsers now support WebP including Chrome, Firefox, Safari, and Edge.
Which image formats can this tool convert to WebP?
The converter accepts JPG, JPEG, PNG, GIF, BMP, and even existing WebP files (for re-compression at a different quality). Simply drop any of these formats and they will be converted to optimized WebP in your browser.
Are my images uploaded to a server?
No — everything runs entirely in your browser using the Canvas API. Your images never touch our servers, never get logged, and never leave your device. This makes the tool safe for confidential photos, client work, and sensitive documents.
What's the difference between lossy and lossless WebP?
Lossy WebP (default) removes some data to achieve smaller file sizes, similar to JPEG — great for photos where the size reduction (25-35%) outweighs an imperceptible quality drop. Lossless WebP preserves every pixel exactly, similar to PNG — use it for logos, icons, screenshots, and graphics with sharp text.
How do I convert multiple images at once?
Drop or select all your images together — the tool converts every file in the batch simultaneously. When done, download each individually or grab a ZIP of the whole batch. There's no limit on how many files you can process at one time.
Does the converter preserve PNG transparency?
Yes. WebP supports transparency natively, and this tool preserves the alpha channel when converting from PNG. Your logos, icons, and cutouts stay transparent — no white background added, no matte artifacts.
Can I control the WebP output quality?
Yes — use the quality slider (1-100) to balance file size against visual quality. 80 is the recommended default (visually identical to the original for most photos). Drop to 60-70 for smaller files where absolute quality isn't critical. Raise to 90+ for hero images and product photography.
Will converted WebP images work on my website?
Yes. WebP is supported in 96%+ of browsers including Chrome, Firefox, Edge, Safari (14+), Opera, and mobile browsers. For older browsers, you can use the HTML picture element to serve WebP with a JPG or PNG fallback.
Does converting to WebP hurt my SEO?
The opposite — WebP boosts SEO. Faster-loading images improve Core Web Vitals (LCP), which is a direct Google ranking factor. Serving optimized WebP images is one of the highest-impact technical SEO wins available.
Is there a file size limit for conversion?
Because conversion happens in your browser, the limit depends on your device's memory. Typically images up to 100 MB each convert without issue on modern computers and phones. For extremely large images (over 200 MB), a desktop with more RAM works best.
Why choose our tool?
100% Private
Everything runs in your browser. Your data never leaves your device — no uploads, no server processing, no tracking.
Instant Results
No loading screens, no waiting, no queues. Results appear the moment you click — powered by client-side JavaScript.
No Sign-Up Ever
No accounts, no emails, no passwords. Just open the page and start using it — forever free, no strings attached.
Works Everywhere
Phone, tablet, laptop, desktop — any browser, any OS. Fully responsive and works offline once loaded.