Compress WebP Files Online for Free

Free

Reduce WebP file size further. Supports both lossy and lossless WebP modes. No upload. Free.

webp optimizerreduce webp file sizewebp compressor
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What's next

Compress a JPEG
Different quality rules apply to JPEG
Convert PNG to WebP
Convert before compressing for best results
Resize first
Resize to display dimensions for maximum reduction

Settings guide

WebP compression modes:

  • ·Lossy mode (default): Quality 75–85% for web images. 80% WebP quality is roughly equivalent to 90% JPEG quality at 25–35% smaller file size.
  • ·Lossless mode: No quality setting — optimises encoding only. Produces larger files than lossy but pixel-perfect output. Use for graphics, screenshots, and icons.
  • ·When WebP is still too large: Reduce dimensions first using the resize tool, then recompress. WebP is most efficient when the pixel count is appropriate for the intended display size.

Quality recommendations: Hero images: 75–80%. Thumbnails: 65–75%. Images with transparency requiring quality preservation: use lossless mode.

Format comparison

WebP vs JPEG: WebP achieves 25–35% smaller files at equivalent quality. Both support lossy compression. JPEG has broader software support. Use WebP for web delivery, JPEG for email and universal compatibility.

WebP vs PNG: WebP lossless is 26% smaller than PNG. WebP supports transparency. For web-only use, WebP is superior. For maximum software compatibility, PNG wins.

WebP vs AVIF: AVIF is 40–50% smaller than WebP at equivalent quality but has lower browser and tooling support as of 2025. WebP remains the practical standard for most web projects.

How it works

1

Upload

Drop your WebP file into the compressor.

2

Choose mode

Select lossy (smaller files) or lossless (pixel-perfect). Lossy is recommended for photos; lossless for graphics.

3

Adjust quality

In lossy mode, set quality 75–85% for optimal web delivery.

4

Download

Save the compressed WebP to your device.

About this format

WebP is unique in supporting both lossy and lossless compression modes in the same format — unlike JPEG (lossy only) or PNG (lossless only). This dual-mode design makes WebP one of the most versatile image formats for the web, but it also means compression behaves differently depending on how your WebP was originally created.

This compressor targets WebP specifically: how to identify whether your file uses lossy or lossless encoding, when to switch modes, and how to achieve maximum size reduction without visible degradation. WebP does not accumulate generation loss as aggressively as JPEG, making it more forgiving for iterative compression.

Drop your WebP file, adjust settings, and download. Everything runs in your browser.

Frequently asked questions

Does compressing WebP use lossy or lossless compression?+
WebP supports both. Our compressor defaults to lossy compression (smaller files). Switch to lossless mode to preserve every pixel — useful for screenshots and graphics.
Can I compress a WebP further without converting it?+
Yes. WebP files can be recompressed. Each lossy cycle degrades quality slightly, so start from the highest-quality source available.
Why is my WebP file larger than the original JPEG?+
Usually because the original JPEG was already heavily compressed. Re-encoding from a lossy source adds overhead. Always compress from the original source, not an existing compressed file.
Does WebP support transparency after compression?+
Yes. WebP natively supports alpha channel transparency, preserved in both lossy and lossless modes.
What software can open compressed WebP files?+
Chrome, Firefox, Safari, Edge, Photoshop 2022+, GIMP, Affinity Photo, and Windows 11 Photos. For older software, convert to PNG or JPEG first.
Are my WebP files uploaded to a server?+
No. Compression runs locally in your browser. Nothing is transmitted.

Related tools and guides

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