Files and media tool
Compress images locally, with the tradeoffs visible
Choose a practical preset or set the format, quality, dimensions, and approximate target size yourself. Your images stay in this browser.
Local compression batch
Choose up to 12 JPEG, PNG, or WebP images (150 MB total). Nothing is uploaded to NumberNumber.
Drop images here or choose filesLocal browser processing only. Animated images export as their first frame.
Ready for a local image batch.
Before and after
No compressed images yet.
Notes
Use this space for project notes before saving as PDF.
Disclaimer: Use calculations at your own risk. For critical applications, verify results against your governing standards/specifications.
Format and metadata guidance
- WebP is usually the best web default. JPEG works widely and is good for photographs. PNG preserves transparency but may not reduce size much.
- JPEG output uses a white background when the source has transparency. Browser canvas export strips most metadata, including camera location data, but browser behavior can vary.
- A target is an approximation: the tool reduces lossy quality in steps but never silently changes the selected pixel limit to meet it.
More Files & Media tools
Continue with another focused tool in this category, or return to the complete tool directory.
- Image Cropper, Resizer, and Converter — Crop, resize, and export a web-ready image locally from one focused workspace.
- Image and PDF Converter — Create one PDF from images or render selected PDF pages as local image files.
- File-Size and Transfer Planner — Plan file size, bitrate, duration, storage capacity, and upload or download time with clear units.
- Browse Files & Media
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