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WebP compress online

WebP compress online free. Re-encode still WebP with a quality slider, preview the result, download a smaller file. Local-first, no sign-in.

What is WebP compress?

WebP compress re-encodes a still WebP (or PNG / JPEG) into a new WebP file, usually to reduce download size for product pages, galleries, and uploads. People search for “webp compress” when a file is already WebP but still larger than the page needs. This free local-first tool uses a quality slider and a maximum-quality option—compression cannot invent detail that was never in the source, and already optimized files may barely shrink.

WebP compress features

Re-encode still WebP for a smaller download.

  • Quality slider

    Trade detail for file size from 1 to 100.

  • Maximum quality option

    Lock the encoder to its highest quality setting when size is secondary.

  • Live preview

    See the compressed WebP before you download.

  • Local-first

    Compress in the browser with no signup.

How to compress WebP online

Smaller still WebP in three steps.

  1. Add a WebP

    Drop a still WebP, or a PNG / JPEG to re-encode as WebP.

  2. Set quality

    Lower the slider for a smaller file, or enable maximum quality.

  3. Download WebP

    Save the compressed WebP for galleries and uploads.

Tips for WebP compress

Better size without surprise quality loss.
  • 01

    Start around 70–80

    A mid-high quality often cuts size while staying sharp on product pages.

  • 02

    Already tiny files may not shrink

    Re-encoding cannot invent savings if the source is already efficient.

  • 03

    Use converters for format changes

    Prefer JPG to WebP or PNG to WebP when the main job is changing formats.

  • 04

    Still images only

    Do not rely on this tool for animated WebP sequences.

WebP compress vs other tools

When this compressor fits.

  • JPG to WebP

    Convert JPEG sources to WebP. Use this page when the file is already WebP and still too large.

  • PNG to WebP

    Convert PNG to WebP. Use WebP compress to re-encode an existing WebP.

  • GIF compressor

    Shrink animated GIFs. This page targets still WebP only.

Great for

Jobs that need a lighter WebP.

  • Product galleries

    Trim WebP assets that still exceed a page budget.

  • Upload limits

    Meet size caps while staying in WebP.

  • Portfolio batches

    Re-encode still shots one at a time before publishing.

Why compress WebP here

Fast local re-encoding.

  • Free

    Unlimited WebP compress runs with no signup.

  • Local-first

    Images stay in the browser for this tool.

  • No watermark

    Clean WebP downloads.

  • Quality control

    Pick the size–quality tradeoff that fits the page.

Technical notes

How WebP compress works here.
Encoder
Browser Canvas 2D toDataURL / WebP output.
Quality
Lossy quality 1–100, plus a maximum-quality toggle.
Input
Still WebP preferred; PNG and JPEG also accepted.
Privacy
Client-side only—no network upload.

Sources & References

References on WebP and canvas encoding.
  • “WebP is a modern image format that provides superior lossless and lossy compression for images on the web.”
    — Google Developers — WebP

    WebP format: Official WebP docs explain why re-encoding can shrink web images. developers.google.com/speed/webp

  • “The Canvas API provides a means for drawing graphics via JavaScript and the HTML canvas element.”
    — MDN Web Docs — Canvas API

    Canvas API: This tool draws the source and exports WebP via the canvas encoder. developer.mozilla.org/en-US/docs/Web/API/Canvas_API

  • “The HTMLCanvasElement.toDataURL() method returns a data URL containing a representation of the image in the format specified by the type parameter.”
    — MDN Web Docs — toDataURL

    HTMLCanvasElement.toDataURL: Quality for image/webp is passed through toDataURL for lossy compression. developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toDataURL

Frequently Asked Questions

Quick answers about this tool—open a question to read more.