Reduce the Colour Palette
Use fewer colours when the image can tolerate palette reduction without visible banding or colour shifts.
Transparent PNG Compressor - Reduce Size, Keep Alpha
Drop images or folders here, or , or click to choose
Compress a transparent PNG or a complete folder in your browser. Reduce palette colours, adjust dithering and dimensions, then inspect transparent areas before downloading.
Try a sample
Check PNG Transparency Before Downloading
Use the comparison preview to inspect transparent areas, edge pixels, colours, dimensions and the change in file size.
PNG Palette, Dithering and Alpha Transparency
Adjust the settings that affect transparent PNG appearance and file size, then inspect the result before export.
Adjust Dithering
Tune dithering to balance smooth colour transitions against texture and file size.
Keep Alpha Transparency
Export as PNG and inspect transparent areas and edge pixels in the preview.
How to Compress a Transparent PNG
- 01
Add Transparent PNG Files
Choose one or more PNG files, add a folder, drag files onto the page, or paste an image.
- 02
Reduce Colours and Adjust Dithering
Choose a smaller colour palette, tune dithering, and reduce dimensions when the image is larger than required.
- 03
Check Alpha and Download
Inspect transparent edges and visual detail, then download one compressed PNG or the complete batch.
Palette SizeReducing the number of colours can make icons, illustrations and interface graphics smaller.
Image DimensionsReduce unnecessary pixel width and height when the PNG is larger than its intended display size.
Batch SettingsApply one palette, dithering and dimension configuration to the complete PNG queue.
Reduce Transparent PNG File Size
Palette size, image dimensions and visual complexity influence the final PNG file size.
Compress Transparent PNGs Now
Add transparent PNG files, adjust palette settings and inspect the result in your browser.
FAQs
How do I compress a transparent PNG?
Add the PNG, reduce palette colours or dimensions, adjust dithering, inspect transparent areas, and download the PNG result.
Does PNG compression remove transparency?
Not when you export as PNG. The result still supports alpha transparency, which you can verify in the preview.
Can I compress a transparent PNG without losing quality?
PNG encoding is lossless, but palette reduction changes the available colours. Use the comparison preview and keep more colours when exact appearance matters.
Why is my transparent PNG file large?
Large pixel dimensions, many colours, detailed textures and complex transparent edges can all increase PNG file size.
Can I compress several transparent PNGs at once?
Yes. Add multiple PNG files or a folder, apply shared settings, and download the results in a ZIP.
Can I convert a transparent PNG to WebP?
Yes. Select WebP output and compare transparency and file size before downloading.
Are transparent PNG files uploaded to Vicoco?
No. Processing runs locally in the browser.