Compress PNG
Reduce PNG file size up to 80% while maintaining quality. Fast, secure, and free.
or drop files here
Maximum file size: 50MB per file
Convert to a modern format for better compression. WebP is recommended for best results.
High Quality
Keep your files clear and usable while reducing size or converting formats.
100% Secure
All processing happens in your browser. Your files never leave your device.
Super Fast
Process multiple files in seconds with our optimized browser-based tools.
Compress, convert & crop images offline on iPhone - privacy-first, batch up to 200
Compress to Target Size
Quickly compress your files to specific file sizes
Related Tools
Compress MP3
Compress MP3 files online in your browser. Reduce audio size for sharing, podcasts, and storage without uploading your files.
Compress TIFF
Compress TIFF images for photography and print. Reduce file size while preserving professional quality.
Compress JPG
Compress JPG/JPEG images without losing quality. Reduce file size instantly.
Compress HEIC
Reduce HEIC/HEIF file size from iPhone photos. Maintain quality while saving storage space.
Compress MP4
Compress MP4 videos online in your browser. Reduce video file size for uploads, sharing, and storage without uploading your files.
Compress WebP
Optimize WebP images for better performance. Reduce WebP file size efficiently.
About PNG Compression
Why PNG files are large — and what actually shrinks them
PNG is a lossless format: every pixel is preserved exactly, which is why logos, screenshots, and graphics with sharp edges or transparency look crisp but balloon in size. The two biggest contributors are uncompressed pixel data and a full color palette. Effective PNG compression re-encodes that data — through palette reduction, alpha-channel handling, and deflate recompression — without changing a single pixel's appearance. The result is a file that looks identical but loads far faster.
100% in-browser: your images never leave your device
Unlike online compressors that upload each image to a remote server, this tool runs entirely in your browser using the Canvas API and WebAssembly. That means no upload wait, no server-side storage, and no privacy exposure — important for ID scans, design assets, or any sensitive graphic. Processing happens at the speed of your own CPU, and the optimized file is saved directly back to your device.
Where optimized PNGs matter most
PNG is the right choice when you need transparency, crisp text, or flat regions of color — logos, UI elements, icons, line art, and screenshots. After compression these assets stay razor-sharp while meeting strict size budgets for web pages, email attachments, app bundles, and CDN delivery. For photographs, a lossy format such as JPG or WebP usually reaches a smaller size; PNG wins when fidelity and transparency are non-negotiable.
How to Use This Tool
-
1
Select Your Files
Click the upload button or drag and drop your files into the upload area. You can select multiple files at once.
-
2
Start Processing
Choose the settings you need, then start the tool. Processing happens in your browser and results appear in real time.
-
3
Download the Results
Download your processed files individually or all at once when the task is complete. Your original files remain unchanged.
Frequently Asked Questions
How to compress PNG without losing quality?
Our PNG compressor uses lossless optimization to reduce file size without any quality loss.
How to reduce PNG file size online?
Upload your PNG and choose between lossless and lossy compression for the best balance.
What is the difference between lossless and lossy PNG compression?
Lossless mode keeps every pixel identical to the original — ideal for logos and UI assets. Lossy mode reduces the color palette and applies subtle quality reduction to reach much smaller file sizes, which suits previews and thumbnails.
Are there file size or quantity limits?
Because compression runs entirely in your browser, there is no server upload limit. The practical limit is your device's available memory, so very large batches or huge images may take longer on low-RAM devices.
Will compression remove transparency from my PNG?
No. The alpha channel that stores transparency is preserved, so logos and graphics with transparent backgrounds keep their transparency after compression.
Why Choose Let Compress?
- Lossless mode that keeps every pixel identical — perfect for logos and UI assets
- 100% client-side processing: your files never leave the browser
- Batch-process dozens of PNGs at once with no upload wait
- Free, no account, and no watermark — optimized files are ready instantly
Learn More About Image Compression
Explore these authoritative resources to deepen your understanding of image compression and optimization.
MDN Web Docs: Image Optimization
Comprehensive guide on image optimization for web performance by Mozilla.
Google Web Fundamentals: Image Optimization
Best practices for image optimization from Google's web performance team.
W3C WebP Specification
Official W3C specification for the WebP image format.