PNG Compressor – Compress PNG Online (Free Tool)
Free online PNG Compressor tool to compress PNG images without losing quality. Reduce file size for faster web loading. All processing happens locally in your browser.
Example Output
Lossless PNG re-encoding plus palette optimisation where possible.
logo.png (~120 KB) — 33% smaller, identical to the eye
What is PNG Compressor?
PNG Compressor shrinks PNG file size while preserving transparency and visual quality. Uses lossless re-encoding for true PNG fidelity, plus optional palette reduction for images with few colours. Useful for web optimisation, email attachments, and reducing asset sizes in production builds.
Why use this tool?
- Open-and-go: bookmark the page once and never look for an alternative
- Instant results — no waiting on a server or upload progress bar
- Touch-friendly UI, fine on phones for on-the-go edits
- Output preserves color profile and metadata except when stripping is explicitly requested
- Supports PNG, JPG, WebP, GIF, and SVG with consistent quality across formats
How to use
- Drop one or more PNG files
- Compression analyses the image — transparent PNGs preserved
- See before/after sizes side by side
- Download individual files or all as a ZIP
Examples
Bulk-optimise web assets
Drop a folder of UI PNGs — typically saves 20-40% with no quality loss.
Shrink an icon set
Few-colour icons benefit most from palette reduction — sometimes 60%+ smaller.
Common use cases
- Web asset optimisation for faster page loads
- Reducing PNG sizes before email attachment
- Shrinking icon sets in production builds
- Cutting bandwidth costs on PNG-heavy sites
Troubleshooting
- Compression savings minimal on photos.
- PNG is lossless and inefficient for photos. Convert to JPG or WebP instead — much bigger savings.
Frequently Asked Questions
PNG compression uses lossless algorithms to reduce file size without quality loss. It optimizes the image data encoding and removes metadata to create smaller files.
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