Is this PNG to WEBP converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple PNG files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

Will the image quality change after conversion?

It depends on the formats involved. Converting to a lossless format like PNG preserves every pixel exactly. Converting to a lossy format like JPEG or WebP applies compression — we default to 85% quality, which looks identical to the original for almost all images. You won't notice a difference unless you zoom in pixel-by-pixel.

Do you support batch image conversion?

Yes — drop multiple images at once and they all convert in parallel. Free accounts handle up to 5 at a time; Pro is unlimited. Download everything as a single ZIP when you're done.

Is WebP lossless like PNG?

WebP supports both lossless and lossy compression. We default to lossless WebP for PNG inputs, which preserves every pixel identically to the source PNG while typically achieving 25–35% smaller file sizes.

Will transparency be preserved when converting PNG to WebP?

Yes — WebP supports alpha transparency just like PNG. Transparent areas in your PNG will carry through to the WebP output correctly.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

PNG to WebP — Free, Smaller Files, No Upload

How to convert PNG to WEBP online

1
Drop your PNG file
Drag and drop your Portable Network Graphics file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Portable Network Graphics → Web Picture Format entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your WEBP
Your Web Picture Format file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

PNG vs WEBP: format overview

PNG

Portable Network Graphics

PNG Development Group (Thomas Boutell) · 1996

Compression: lossless
Color depth: 16-bit
Transparency: Yes

✓ Lossless compression — pixel-perfect quality
✓ Full alpha transparency (8-bit alpha channel)
✗ Large file sizes for photos

WEBP

Web Picture Format

Google (On2 Technologies acquisition) · 2010

Compression: hybrid
Color depth: 8-bit
Transparency: Yes

✓ 30% smaller than JPEG, 26% smaller than PNG
✓ Supports both lossy and lossless

PNG magic bytes: 89 50 4E 47 0D 0A 1A 0A

WEBP magic bytes: 52 49 46 46 xx xx xx xx 57 45 42 50

Why convert PNG to WEBP?

PNG files on a website carry a real performance cost. A full-resolution product photo or hero image saved as PNG can easily reach 1-3 MB, and if a page loads a dozen of them the cumulative weight slows down every visitor — especially on mobile connections. Google's Core Web Vitals scoring penalizes slow Largest Contentful Paint, and page speed directly affects both bounce rate and search rankings. This is the conversion that site owners reach for when a Lighthouse audit flags oversized images.

WebP delivers 25-35% smaller files than PNG at equivalent visual quality, and it supports transparency (alpha channel) just like PNG does — so logos, icons, and cut-out product images convert cleanly without a white background appearing. All major browsers have supported WebP since 2020, including Safari 14+, so compatibility is no longer a concern for modern web work. WordPress, Shopify, Squarespace, and most modern CDNs serve WebP automatically when the browser signals support, and tools like Cloudinary and ImageKit use it as their default delivery format.

For most web images the conversion is straightforward: drop in your PNG, get a WebP back, replace the file reference in your HTML or CSS. Where you need to be careful is with very flat graphics — icons and illustrations with large solid color areas compress extremely well in WebP, but photographic images with fine texture gain less. If you use a `<picture>` element with a WebP source and a PNG fallback, older browsers get the PNG automatically and you cover all cases without maintaining two separate build pipelines.

Quality & file size: PNG to WEBP

Typical file sizes: PNG 8–25 MB → WEBP 1–3 MB.

Both PNG and WEBP use lossy compression. We transcode at high quality settings (equivalent to WEBP's recommended web quality) to minimize generational loss.

Color depth: PNG supports 16-bit, WEBP supports 8-bit.

Transparency: PNG supports transparency. WEBP preserves transparency.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your PNG files are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.