Compress Files Instantly
Free, fast, and private. Compress images and PDFs right in your browser. No uploads, no servers — your files never leave your device.
Drop images here or click to upload
PNG, JPG, WebP, HEIC — up to 50MB each
Compresso is a free online image compressor that reduces the file size of JPEG, PNG, WebP, and GIF images while maintaining visual quality. The tool uses advanced compression algorithms running entirely in the browser — no images are uploaded to external servers, ensuring complete privacy. Users can adjust the quality slider to balance file size and visual fidelity, batch-process multiple images simultaneously, and download optimized files instantly. Compresso typically achieves 40-80% file size reduction depending on the source image and quality setting. The tool also supports compressing images to specific target sizes like 100KB, 200KB, 500KB, and 1MB. No signup, no account creation, and no credit card required. Works on any device with a modern web browser.
Compress to a Specific Size
100% Private
All compression happens in your browser. Your files are never uploaded to any server.
Lightning Fast
No waiting for uploads or server processing. Compression starts instantly on your device.
Completely Free
No sign-up, no limits, no watermarks. Compress as many images as you want.
Compress Any File Format
Compresso supports all major image formats and PDF files. Choose a tool below or use the compressor above for automatic detection.
Compress PNG
Reduce PNG file sizes without losing transparency
Compress JPG
Optimize JPEG photos for web and email
Compress WebP
Shrink WebP images for faster page loads
Compress GIF
Reduce animated GIF file sizes
Resize Images
Scale images to exact dimensions
Bulk Compress
Compress hundreds of images at once
Compress to 100KB
Meet upload size limits easily
Compress to 500KB
Perfect balance of quality and size
Compress to 1MB
Ideal for email and web uploads
Compress for Email
Optimize images for email attachments
Compress for Web
Optimize images for website performance
Compress HEIC
Compress & convert iPhone HEIC photos
Compress PDF
Reduce PDF file sizes while preserving content
Compress Video
Shrink MP4, MOV, and WebM video files
Compress Audio
Compress MP3, WAV, FLAC, and more
Compress SVG
Optimize and minify SVG vector files
Compress DOCX
Reduce Word document file sizes
Compress PPTX
Shrink PowerPoint presentations
Compress ZIP
Re-compress ZIP archives for smaller output
Create ZIP
Create ZIP archives from multiple files
Create 7z
Create 7z archives with LZMA2 compression
Convert Between Formats
How It Works
Upload Your Images
Drag and drop or click to select PNG, JPG, or WebP files.
Adjust Settings
Set quality level, resize dimensions, and output format.
Download
Get your compressed images instantly. Download individually or as a ZIP.
Why Choose Compresso?
Most online compressors upload your files to their servers. Compresso is different — all compression happens directly in your browser. Your files never leave your device, making it the most private way to compress images and PDFs online.
Whether you need to compress images for email, optimize images for your website, or meet a specific file size limit, Compresso handles it all with zero sign-ups and zero cost.
Frequently Asked Questions
Is Compresso really free?
Yes, 100% free with no limits. There are no sign-ups, no watermarks, and no hidden fees. You can compress as many images as you want.
Are my images safe?
Absolutely. Compresso processes everything in your browser. Your images are never uploaded to any server. Once you close the tab, the data is gone.
What file formats does Compresso support?
Compresso supports PNG, JPG/JPEG, WebP, GIF, HEIC, and PDF. You can also convert between image formats — for example, PNG to JPG or WebP to PNG.
How much can I reduce file sizes?
Typically 50–80% reduction depending on the image and quality settings. Photos (JPG) often compress by 60–70%, while PNGs with large flat areas can shrink by 80% or more.
Can I compress multiple images at once?
Yes! Use the bulk compress feature to process hundreds of images simultaneously. You can download them all as a ZIP file.
Does compression reduce image quality?
You control the quality slider. At 80% quality, most images look identical to the original. For lossless PNG compression, there's zero quality loss.
Does Compresso support HEIC files from iPhone?
Yes! Compresso is one of the few online tools that supports HEIC/HEIF compression and conversion. You can convert HEIC to JPG, PNG, or WebP directly in your browser.
How does Compresso compare to TinyPNG?
Both tools compress images effectively. The key difference: TinyPNG uploads your images to their servers, while Compresso processes everything in your browser. Your files never leave your device with Compresso.
Can I compress PDF files with Compresso?
Yes. Compresso offers PDF compression with three levels (low, medium, high). Like image compression, PDF processing happens entirely in your browser — your documents stay private.
What is client-side compression?
Client-side compression means your files are processed directly in your web browser using JavaScript, without being uploaded to any server. This ensures complete privacy — your files never leave your device.