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WebP ↔ PNG Converter
Convert PNG to WebP or WebP back to PNG. Batch-friendly, runs in your browser, no upload.
What this converter does
This tool converts between two of the most common web image formats: PNG, the lossless veteran that handles transparency and crisp UI graphics, and WebP, Google’s modern format that typically saves 25-35% of the bytes at similar visual quality. Drop a PNG to get a WebP for the web, or drop a WebP from a download to get a PNG you can open in any legacy editor. Everything happens in your browser: your files are decoded into a <canvas> element using the same engine the page itself uses, then re-encoded to the target format. There is no upload, no server round-trip, no temporary copy stored anywhere outside this tab. That makes it safe for screenshots with sensitive information, design assets you can’t share publicly, or simply for batches too large to wait on a remote service. Drop a single file or a hundred at once — they’re processed sequentially to keep memory in check on mobile, with a counter showing progress. When the batch is done, download files individually or grab everything as a ZIP. The conversion preserves dimensions exactly; only the encoding changes.
How to use it
- Pick a direction — Choose WebP → PNG if you have WebP files and need PNGs, or PNG → WebP to shrink PNGs for the web.
- Set quality (WebP only) — When encoding to WebP, slide between 10 and 100. 80-90 is the sweet spot for photos; 100 keeps everything but barely shrinks; 60-70 is fine for thumbnails.
- Drop your files — Drag images into the drop zone or click to pick. Multiple files are processed one after another so your phone won’t run out of memory.
- Download — Each file gets its own download button. With more than one file, the Download all button packages everything into a single ZIP for one-click batch saving.
What’s happening under the hood
Each image is decoded into a full-resolution bitmap and re-encoded into the target format right there on your device. PNG output is lossless, so it is the right choice for screenshots, diagrams, logos and any image where sharp edges matter. WebP output is lossy, controlled by a quality slider from 0 to 100 — at quality 80 it is visually identical to a high-quality JPG while typically being 20-30% smaller, which is why every modern browser, every mobile OS, and every CMS now supports it. The conversion has no quality penalty compared to a desktop tool at the same setting, and your image data stays on your device throughout — nothing is uploaded, nothing is logged, nothing persists once you close the tab.
PNG vs WebP cheat sheet
PNG is lossless, supports full alpha transparency, and is universally readable — perfect for icons, screenshots, and assets that pass through tools that don’t speak WebP. WebP is smaller (typically 25-35% less for photos, even more for graphics), supports both lossless and lossy modes, and is supported by every modern browser including Safari since 2020. Use WebP for the web; convert to PNG when sharing with someone whose toolchain may be older.