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
Maintain file quality while reducing file size up to 80%.
100% Secure
All processing happens in your browser. Your files never leave your device.
Super Fast
Compress multiple files in seconds with our optimised algorithms.
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
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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.
Made for Users in Australia
Australian internet ranges from fast NBN fibre in the capitals to satellite and fixed-wireless in regional and remote areas. Keeping files small is essential for reliable sharing across the NBN, for uploads to myGov and state services, and for delivering content to audiences on Telstra, Optus, and Vodafone mobile networks across vast distances.
- myGov and state government portals enforce upload limits — compress scanned IDs and documents before lodging them.
- For regional users on fixed-wireless or satellite NBN, smaller files mean fewer timeouts on slower, higher-latency links.
- Australian mobile plans often include data caps; pre-compressed media saves data for end users on the go.
- When sharing with New Zealand and Southeast Asia, smaller attachments transfer more reliably across trans-Tasman links.
How to Compress :format Files
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1
Select Your Files
Click upload or drag your files into the area. Queue several at once for batch processing.
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2
Start Processing
Choose your settings and start. Everything runs locally in your browser — no upload, which is especially helpful on regional and satellite NBN.
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3
Download the Results
Save your files individually or all at once. Your originals are never changed, and you only use data on the final smaller download.
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.
Can I compress files for myGov and state government portals?
Yes. myGov and state services often limit document sizes. Our tools help you get scans and forms under those limits before you upload them.
Will this work on slow regional or satellite NBN?
Yes. Because files are processed locally and never uploaded, the tool works well even on fixed-wireless and satellite connections where upload speeds are limited.
Does it respect my data cap?
Absolutely. Since nothing is uploaded, you only use data for the final, smaller download — ideal for Australians on metered mobile and NBN plans.
What file formats are supported?
We support PNG, JPG, WebP, AVIF, GIF, BMP, PDF, and many more. Check each tool page for its specific format support.
Why Choose Let Compress?
- No upload — saves your NBN and mobile data allowance
- 100% free, no sign-up — no subscriptions or hidden fees
- Reliable on slower regional, fixed-wireless, and satellite NBN connections
- Batch processing for busy Australian workflows
- Works in any modern browser — nothing to install
- Privacy by design — your files stay on your device
Learn More About File Compression
Explore these authoritative resources to deepen your understanding of file compression and optimisation.
MDN Web Docs: Image Optimisation
Comprehensive guide on image optimisation for web performance by Mozilla.
Google Web Fundamentals: Image Optimisation
Best practices for image optimisation from Google's web performance team.
W3C WebP Specification
Official W3C specification for the WebP image format.