How much smaller will my WebP file get?

WebP is already an efficient format, but efficient is not the same as small. Exporters routinely emit WebP at quality 90 or higher, image CDNs pass through whatever they were given, and design tools default to settings tuned for safety rather than size. Recompressing keeps the format and the dimensions and simply re-encodes at a lower quality.

The usual driver is page weight. A media library of a few thousand images at 250 KB each is most of a megabyte of payload on any page that shows a handful of them. Dropping to quality 80 typically halves each file with no difference visible at normal viewing sizes — which shows up directly in Largest Contentful Paint and Core Web Vitals.

The second driver is upload caps. Plenty of forms, marketplaces and job portals enforce a hard per-file limit. Target-size mode binary-searches for the highest quality that fits under a figure you set in KB, so you get the best-looking file that will actually upload. WebP is lossy, so compress copies and keep your originals.

You typically reach for Compress WebP when a WebP file is too large for its destination. Common situations include:

• Email attachments – Gmail caps at 25 MB, Outlook at 20 MB; a single phone photo is often 6–10 MB.
• Upload portals – real-estate listing sites, school portals and insurance forms commonly cap each file at 2–5 MB.
• Web performance – compressing hero images and gallery photos directly improves Core Web Vitals scores and reduces bandwidth costs.
• Storage – when archiving thousands of photos to a cloud drive, a 70–80% size reduction at quality 85 is invisible to the eye.

1. Open the Compress WebP tool on webp.now.
2. Drag your WebP file onto the drop zone, or click Select files. You can drop a whole folder of files at once.
3. Pick a compression preset (Small, Balanced, High, Max) or move the quality slider for fine-grained control. Higher quality = larger file.
4. Click Compress. The job runs on our server and finishes in a few seconds for typical photos.
5. Download the result. Files stay in storage for 24 hours and are then permanently deleted.

The entire flow is free for the first 10 jobs per day with no signup required. A free account doubles that quota; a premium plan removes the limit entirely.

• Quality 80 is the default for a reason — it is the point where most photographic images stop being distinguishable from the original.
• Use lossless mode for logos, icons and screenshots. Lossy compression puts visible fuzz around text and hard edges.
• Set a target size in KB when an upload form enforces a cap; the encoder will find the best quality that fits.
• Strip metadata unless you specifically need the EXIF — it is dead weight for web delivery and can leak camera and location data.
• Compress copies, not masters. WebP is lossy, and each pass discards a little more that you cannot get back.