AssetMelt

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Web OptimizedWEBP · max 1920px

Files never uploaded · 100% client-side · I cannot see your photos · Privacy policy

Pipeline ready: PNG → WebP (any input still accepted)

Free PNG to WebP converter in your browser

Asset Melt Studio is a PNG to WebP converter that runs entirely on your device. WebP usually beats PNG on photos and soft gradients while still supporting alpha — ideal for product cutouts, UI chrome, and screenshot-heavy docs.

Drop one PNG or a whole folder — the pipeline is already set to WebP using the official WebP encoder. That is the PNG to WebP workflow people search for: convert PNG to WebP without an upload, then resize, crop, or hit a size budget (when the codec allows) before you download.

Input is not locked to PNG: you can still open JPEG, PNG, WebP, AVIF, HEIC, GIF, and more in the same session. The PNG to WebP URL simply pre-selects WebP so png to webp jobs start in one click.

Typical PNG to WebP result

A ceramic mug product photo exported as PNG for the web.

~87% smaller

Ceramic mug product photo on a white backdrop
Ceramic mug product photo on a white backdrop
PNG · 1.6 MBWebP · 210 KB

Before · PNG1.6 MB — Lossless product still

After · WebP210 KB — Quality ~85

Illustrative PNG to WebP on a studio product shot — your savings will differ. Drop a PNG above to convert on this device.

How to use this converter

  1. Step 1

    Open this PNG to WebP page

    You are already on the PNG to WebP converter. Output is pre-selected as WebP. You can still drop mixed formats — the PNG to WebP URL is a starting point, not a file-type lock.

  2. Step 2

    Drop PNG files (or a folder)

    Drag PNG images onto the studio, click to choose, or paste. Folder drops queue nested images. Then process — PNG to WebP encoding runs in Web Workers on this device.

  3. Step 3

    Preview, tweak, download

    Use the before/after scrubber until the PNG to WebP result looks right. Adjust quality, crop, or resize, then download one WebP or a ZIP of the batch.

PNG to WebP at a glance

PNG to WebP at a glance
TopicPNGWebP
CompressionLossless (file stays large)Lossy or near-lossless, usually much smaller
TransparencyYes (alpha)Yes (alpha)
Browser supportUniversalAll modern browsers
Size budgetSkippedSupported
Best forLogos, icons, archival graphicsWeb delivery with alpha

Why convert PNG to WebP

PNG is a workhorse for graphics, but photographic PNG files balloon because every pixel is stored losslessly. Converting PNG to WebP keeps transparency and typically cuts weight for LCP heroes, cards, and marketing sites that already ship a WebP `<picture>` fallback.

Use PNG to WebP when the destination is the web and you still need alpha. Keep a PNG master in git or Figma if you need a lossless original — WebP here is a delivery format, not an archive format.

Asset Melt encodes PNG to WebP with the official WebP encoder in a worker. You can leave quality high for UI, or turn on a size budget when an upload form caps kilobytes.

Typical PNG to WebP file sizes

Typical PNG to WebP file sizes
SourceBeforeAfterNote
Ceramic mug product PNG1.6 MB PNG~210 KB WebPStudio product still
Logo / flat illustration86 KB PNG~40 KB WebPSmaller win; PNG may already be tiny
Photographic PNG4.2 MB PNG~380 KB WebPLargest savings — prefer WebP or AVIF

How PNG to WebP works in Asset Melt

Drop PNG files on this page. The pipeline is already set to WebP. Decode happens locally, then optional crop, resize, and filters run before the WebP encode.

Transparency is preserved. If you flatten to JPEG later, that is a different conversion — PNG to WebP is the alpha-friendly path.

Preview with the before/after scrubber. When the WebP looks right, download one file or a ZIP of the batch.

When to use PNG to WebP (and when not to)

Product cutouts, app UI, and screenshots that must stay sharp on a transparent canvas.

Replacing bulky PNG photos on a site that already accepts WebP.

Skip PNG to WebP when a printer, CMS, or email client still rejects WebP — use JPEG or PNG instead.

PNG to WebP quality and settings

Start around quality 80–90 for photos and 90–100 for UI with text. Size budget (e.g. 100 KB) is available for WebP. If edges look soft, raise quality or skip extra resize.

Leave metadata strip on unless a CMS needs ICC for brand colors.

Resize longest edge to 1600–2000px for most web photos before PNG to WebP.

Also export AVIF in the same run if you want a modern `<picture>` kit.

Privacy while you convert PNG to WebP

Image processing is 100% client-side in your browser with WebAssembly. Your photos are not uploaded, I cannot see or recover them, and sampled session replay is UI-only and does not include image pixels (media is blocked). The site still sends usage analytics and crash reports — details are on the privacy page. That includes every PNG to WebP job — the converter never needs your files on a server.

Upload compressors send your bitmap to someone else’s API. Asset Melt keeps png to webp on this device. Session replay, if sampled, is UI-only and does not include image pixels.

Related conversions

Frequently asked questions

Yes. This PNG to WebP converter runs entirely in your browser. Image processing is 100% client-side in your browser with WebAssembly. Your photos are not uploaded, I cannot see or recover them, and sampled session replay is UI-only and does not include image pixels (media is blocked). The site still sends usage analytics and crash reports — details are on the privacy page.

No. The Studio still opens JPEG, PNG, WebP, AVIF, HEIC, GIF, TIFF, BMP, SVG, JPEG XL, and QOI. The PNG to WebP URL pre-selects WebP output for the common PNG workflow, but mixed batches are fine — only the output codec is locked to WebP until you change Format settings.

Yes. Queue many PNG files (or a folder), keep WebP as the output, and the Studio encodes in parallel on a worker pool sized to your CPU (up to 4) with live per-file progress, Pause, and Cancel. Pause lets in-flight files finish so you can download what is ready. Optional “ZIP every 25 files” packs numbered ZIPs during encode. There is no 20-image cap; very large PNG to WebP batches depend on device RAM.

PNG to WebP output uses the official WebP encoder via the same Squoosh-grade @jsquash WebAssembly stack, running locally in a Web Worker. You can still crop, resize, filter, and (for lossy WebP) set a size budget before download.

Yes. PNG to WebP conversion is free: no account, no watermark, and no file-count limit. Download one file or a ZIP of the whole queue.

Yes. PNG to WebP keeps the alpha channel. That is the usual reason to pick WebP over JPEG for cutouts and UI.

Default WebP encode is lossy. For a lossless-style WebP, raise quality to the top of the slider and inspect edges. If you need a guaranteed lossless file, stay on PNG (Oxipng) or try JPEG XL.

Yes for design masters. Serve WebP (and optionally AVIF) on the site; keep PNG or a layered source in your repo.