Convert PNG to WebP — Same Transparency, Half the Size
Convert PNG to WebP locally on Mac or Windows — transparency preserved, files up to 50% smaller, no upload required.
Quick answer
TinyPixels converts PNG to WebP locally, fully preserving alpha transparency. Files typically shrink 25–50% with no visible quality difference. Convert one file or an entire folder — no upload, no account.
How to convert PNG to WebP
Download and open TinyPixels
Free to install on Mac or Windows — no account needed to start.
Drag your PNGs or a folder in
Convert a single icon or an entire asset library in one action.
Choose WebP as the output format
Pick lossless for pixel-perfect output, or lossy for maximum savings.
Convert and collect the output
WebP files appear in your output folder — originals stay untouched.
Why convert PNG to WebP
PNG is a reliable lossless format, but its compression is inefficient by modern standards — especially for icons, illustrations, and UI assets with large areas of flat color. WebP, which supports both lossy and lossless modes plus full alpha transparency, typically produces noticeably smaller files for the exact same visual result.
For websites and apps, this translates directly into faster load times and lower bandwidth costs. TinyPixels handles the conversion locally, so your source PNGs never leave your machine, and you can batch-convert an entire asset library in one pass.
Transparency preserved
Alpha channels convert exactly — no flattening, no white backgrounds.
Lossy or lossless WebP
Choose lossless for pixel-perfect output, or lossy for maximum savings.
Bulk folder conversion
Convert hundreds of PNGs to WebP in one action, fully offline.
No file size limit
Convert a 2KB icon or a 200MB screenshot — no caps.
When it still makes sense to keep PNG
WebP is the better delivery format for the overwhelming majority of web and app use cases, but a few situations still favor keeping PNG:
Source/master files you'll re-edit later
Keep PNG (or your original design file) as the source of truth, and generate WebP as a build step or export — don't throw away editable masters.
Legacy systems with hardcoded format checks
Some older CMS plugins, email clients, or embedded systems may only accept specific formats — verify compatibility before fully migrating a critical asset.
Tools in your pipeline that don't support WebP yet
A handful of design or print workflows still expect PNG/TIFF specifically — check your full pipeline, not just the final delivery point, before converting everything.
Common mistakes converting PNG to WebP
Deleting the PNG source after converting
Keep the original PNG until you're certain you won't need to re-edit or regenerate other formats later — WebP should be an additional export, not a replacement for your master file.
Using lossy WebP for logos and icons without checking
Flat-color graphics with sharp edges can show visible artifacts at aggressive lossy settings — spot-check these specifically, or default to lossless for brand assets.
Not updating references after converting a whole folder
The conversion changes file extensions — any code, CSS, or CMS entry pointing to the old .png path needs updating separately, or a <picture> fallback pattern to serve both.
Assuming every destination accepts WebP
Double-check the specific tool, plugin, or platform you're delivering to before converting an entire library — a handful of older systems still don't.
Frequently asked questions
Does PNG to WebP conversion keep transparency?
Yes. WebP fully supports alpha transparency, just like PNG. TinyPixels preserves transparent backgrounds and semi-transparent pixels exactly when converting.
How much smaller is WebP than PNG?
Typically 25–50% smaller for photographic or complex images, and often more for images with large flat-color areas like icons and UI graphics. Exact savings depend on the image content and quality setting chosen.
Is there a bulk PNG to WebP converter?
Yes. TinyPixels converts entire folders of PNG files to WebP in one pass, running in parallel across your CPU cores, entirely offline with no upload step.
Should I convert all my PNGs to WebP?
For web and app delivery, generally yes — WebP browser support now exceeds 97% globally. For source files you may need to re-edit later, keeping a PNG master and generating WebP as a delivery format is a common workflow.
Will converting to WebP break my existing <img> tags?
It depends on how images are referenced. If your HTML or CSS hardcodes a .png file extension, you'll need to update those references (or serve WebP alongside PNG using a <picture> element with a fallback) rather than simply swapping the file. TinyPixels converts the image data — updating references in your codebase or CMS is a separate step.
Does WebP support the same color depth as PNG?
WebP supports 8-bit color per channel with full alpha transparency, matching standard PNG. It doesn't support PNG's less common 16-bit-per-channel mode, which is rarely used outside specialized image editing workflows — for typical web and app graphics this makes no practical difference.
Convert your PNGs to WebP locally
Free to start. No credit card, no account, no cloud. See Pro pricing →
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