What is a PNG Compressor?
PNG is a lossless format by default, which often means larger files than a photo needs — especially for screenshots and graphics with large flat-color areas. Our PNG compressor applies smart color quantization (similar to tools like pngquant) to shrink file size significantly while keeping transparency intact, controlled by the same quality slider used across our compressors.
How to Compress a PNG Online — Step by Step
- Upload your PNGs. Drag and drop one or more PNG files into the box above.
- Adjust the quality slider. The estimated size next to each file updates live as you move it.
- Compress and download. Click "Compress" and download individually or as a ZIP.
Why Use Our PNG Compressor?
- Preserves transparency (alpha channel) throughout compression.
- Batch support for up to 20 PNGs at once.
- Live estimated size preview as you adjust quality.
- Private — files are automatically deleted within 2 hours.
Frequently Asked Questions
Will compressing a PNG remove its transparent background?▾
No — transparency is preserved throughout the compression process.
Why is my PNG so much bigger than a similar JPG?▾
PNG is lossless by default, which is great for graphics and text but produces larger files than JPG for photos — our compressor's quality slider lets you trade some of that losslessness for a smaller file.
Can I batch-compress PNGs?▾
Yes, up to 20 at a time, each with its own result, plus a "Download All as ZIP" option.
Related Tools
- Compress Image — Reduce image file size without losing quality.
- Compress JPG — Shrink JPG file size online.
- Compress JPEG — Shrink JPEG file size online.
- Compress WEBP — Shrink WEBP file size online.
- Compress HEIC — Shrink HEIC file size online.
- Compress BMP — Shrink BMP file size online.