Convert PNG images to WebP online for free. This exact converter is built for web-focused image delivery where smaller files and faster page loads matter.
Max file size 10MB. Sign up for more.
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Checking files and selected output formats.
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A 5 MB PNG typically becomes 1.5 – 2.5 MB as WebP (lossless mode) or 300 – 700 KB (lossy).
Quality: WebP supports both lossless and lossy. Lossless WebP is smaller than PNG with identical pixels. Lossy WebP is smaller still with minimal visible difference at quality 80+.
Best for: modern web — every modern browser (Chrome, Firefox, Safari, Edge) supports WebP natively.
Avoid when: you need a file that opens in older software (pre-2020 Photoshop, very old Windows), or where universal compatibility matters more than file size.
Tip: For web pages, WebP saves bandwidth without sacrificing visual quality. For email or downloads, stick with PNG/JPG for compatibility.
PNG → WebP shrinks lossless imagery by ~26% while keeping transparency intact. The real use case: logo PNGs on a website, UI screenshot assets in documentation, product renders with alpha channels. WebP's lossless mode is purpose-built for exactly the content type PNG is used for. Serve WebP with a PNG fallback in <picture> tags.
WebP is Google's image format — 25-35% smaller than JPG at equivalent visual quality, with support for both lossy and lossless modes plus transparency. Every modern browser supports it. The main use case: cutting page weight on websites. Lighthouse, PageSpeed Insights, and Core Web Vitals audits actively flag JPG/PNG hero images as "serve in next-gen formats" — WebP is the answer.
Every image conversion involves a small trade-off between quality, file size, and compatibility. Here's how to make the choice deliberately, not by accident.
The drop zone above accepts single images or batches. Free-tier uploads are limited to 10 MB per file — enough for phone photos and standard web images. Pro handles files up to 1 GB and batches of up to 20 at once. Filenames are preserved, and the new extension is appended automatically.
WEBP conversions default to a sensible middle ground — high enough that nothing visible is thrown away, low enough that the file isn't oversized. If you're preparing for print, pick a higher quality; for a web thumbnail, drop it. If the target format is lossless (PNG, TIFF, or WebP-lossless), there's no quality slider — every pixel is preserved.
The output is ready in a couple of seconds for a single image, or a few seconds for a batch delivered as a ZIP. Both the source you uploaded and the WEBP output are permanently deleted from our servers within 30 minutes — nothing is retained, backed up, or shared with anyone.
The pixel data in your source is decoded, held briefly in memory as a raw bitmap, and re-encoded into the target format's container. Along the way, we preserve the colour profile embedded in the source (PNG usually carries sRGB; some phone cameras save wider gamuts), any alpha channel where both formats support it, and EXIF metadata where relevant.
If the target format lacks something the source has — say, transparency in a PNG being converted to JPG — that data flattens onto a background before encoding. You'll never lose visible pixels silently; where a trade-off happens, we default to the most common expectation for that specific format pair.
Real reasons people run this conversion — grounded in specific problems, not vague benefits.
WordPress rejects some source formats out of the box. Squarespace, Ghost, and most e-commerce platforms have their own preferred image formats. If the upload button greys out or throws an error, a quick conversion to WEBP usually fixes it — no plugin needed.
Some image formats are ecosystem-specific — HEIC belongs to Apple, WebP has patchy support on legacy Windows apps, and some tools still balk at anything newer than JPG. Converting to WEBP means the person receiving the file doesn't have to install anything to open it.
Passport portals, visa applications, university forms, and job platforms often specify an exact format and file-size ceiling. If the requirement is WEBP, this is the conversion. If they specify size too, run the compression tool afterwards to hit the target byte count.
Figma prefers PNG or SVG for exported assets. InDesign expects TIFF, EPS, or high-quality JPG for print. Canva takes almost anything but produces cleaner results with lossless sources. Converting your image to what the tool actually wants avoids the "why does this look pixelated" back-and-forth.
A 24-megapixel PNG is 20+ MB. Converting to a well-compressed WEBP typically brings that under 3 MB with no visible change on a normal screen. Perfect for sliding under Gmail's 25 MB attachment cap, WhatsApp's compression, or a form's "under 5 MB" rule.
For long-term storage, a stable, widely-supported format matters more than pixel-perfect quality. WEBP is a reasonable archival choice for PNG sources when the goal is "openable in 10 years on whatever device exists then." Bonus: batch convert the entire folder in one pass.
Every conversion happens on TLS-encrypted uploads, on isolated per-request workers, with both the source and the result auto-deleted within 30 minutes. No ads, no watermarks on paid tiers, no metadata mined for training.
Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.
| Property | PNG | WebP |
|---|---|---|
| Full name | Portable Network Graphics | WebP (Google) |
| Year introduced | 1996 | 2010 |
| Developer / standard body | PNG Development Group / W3C | |
| MIME type | image/png | image/webp |
| File extension | .png | .webp |
| Compression | Lossless (DEFLATE) | Lossy or lossless (VP8/VP8L) |
| Color / data depth | 24-bit truecolor + 8-bit alpha | 24-bit + 8-bit alpha |
| Max dimensions / size | 2,147,483,647 × 2,147,483,647 px | 16,383 × 16,383 px |
| Transparency | Yes | Yes |
| Animation | APNG extension only | Yes |
| Standard / specification | W3C / ISO/IEC 15948 | RFC 9649 (lossless), RFC 6386 (VP8) |
| Best for | Logos, screenshots, graphics with transparency or sharp edges | Modern web — 25–35% smaller than JPG/PNG at equivalent quality |
PNG (Portable Network Graphics) is a lossless image format created in 1996 as a patent-free replacement for GIF. It uses DEFLATE lossless compression, meaning every pixel is preserved exactly as intended — no visual information is discarded during encoding. PNG was developed by the web community and standardized by the W3C and ISO, making it one of the most trusted and universally supported image formats available.
PNG is best suited for screenshots, graphics, logos, and any image that requires transparency. Its support for a full alpha channel allows smooth, semi-transparent edges that blend seamlessly with any background. The main trade-off is file size — PNG files are significantly larger than JPEG for photographic content because no visual data is discarded. PNG does not natively support animation; for animated sequences, APNG (Animated Portable Network Graphics) serves as its extension.
Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert PNG files to WEBP.
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