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Capcompress
Free Image Compressor | No Upload, No Server·capcompress.bureaucapcap.com
Capcompress is a free online tool that compresses and converts JPEG, PNG, WebP and AVIF images entirely inside the user's browser using WebAssembly, without uploading files to any server. It supports batch processing of individual files or entire folders, preserving folder structure, and exports results as a ZIP. Users can set quality, target dimensions and encoding effort globally or per image.
What it's for
Bulk image compressionCompressing images for web useConverting between image formats (JPEG, PNG, WebP, AVIF)Compressing an entire folder of images while preserving folder structure
Features 14
- 100% local processing via WebAssembly
- AVIF conversion
- Batch image compression
- Drag & drop of files or folders
- Image resize
- JPEG compression
- Lossless and lossy modes for PNG and WebP
- No account, install, or file size limit
- Parallel processing across CPU cores
- Per-image or global quality/dimension settings
- PNG optimization
- Recursive folder scanning and folder structure preservation
- WebP conversion
- ZIP export of compressed batch
At a glance
free tier
TypeWeb app
DeploymentCloud
PlatformsWeb, iOS, Android
CompanyBureau Capcap
Pricing
Entirely free tool; no credit card or account required at any tier.
FreeFree
Always free, no login, no credit card required, no watermark
No file size cap, no daily quota, no account required