Compress PNG to 100KB

1. Upload your PNG (up to 50 MB).
2. The compressor targets 100 KB — lossless optimization first, then proportional resize if needed.
3. Download the compressed PNG — transparency preserved.

PNG is lossless, so reaching exactly 100 KB sometimes requires reducing image dimensions. Our tool first applies maximum lossless optimization (10-40% reduction), then resizes proportionally if needed — while preserving transparency.

100 KB is a common cap for web uploads, WordPress media libraries, and platform forms. PNG files are often much larger because they're lossless — a single screenshot can easily be 500 KB to 2 MB. Compressing PNG losslessly shrinks the file 10-40% without any quality loss. When lossless alone isn't enough to reach 100 KB, the tool resizes proportionally — preserving aspect ratio and transparency.

The compressor decodes the PNG and re-encodes it using oxipng with aggressive filters and metadata stripping. If the result still exceeds 100 KB, the image is resized proportionally (preserving aspect ratio) until the output is 100 KB or under. Transparency (8-bit alpha) is preserved throughout.

• Uploading PNG to WordPress with a 100 KB cap.
• Reducing PNG logo file size for web delivery.
• Preparing PNG assets for platforms with size limits.
• Optimizing PNG screenshots for documentation.
• Reducing PNG file size for email attachments.
• Shrinking transparent PNG overlays for web.
• Meeting upload size limits on marketplace forms.

PNG optimization is fully lossless — the pixels are byte-identical to the source. If lossless optimization alone cannot reach 100 KB, the image is resized proportionally — this is a resolution reduction, not a quality reduction. The result stays crisp at the new size.

• Very large PNGs (3000px+ screenshots) may need significant resizing to hit 100 KB.
• Resizing reduces resolution — fine for web, not for print.
• Animated PNG (APNG) uses only the first frame.
• For photographs, JPG or WebP is much smaller than PNG.
• Lossless optimization alone may not reach 100 KB for large PNGs.

• Output PNG opens on every device and in every application.
• Transparency preserved — perfect for logos, icons, overlays.
• Accepted by WordPress, Shopify, Wix, Squarespace, Ghost.
• Works with every CMS, marketplace, and upload form.
• Standard PNG — no special software needed.

• Crop or resize to the target display size first for best results.
• For photographs, use JPG or WebP instead — much smaller.
• Transparency is preserved — no white background added.
• Metadata is stripped automatically for maximum savings.
• For very large PNGs, resizing is often needed to reach 100 KB.

Need to hit an exact size? Use our dedicated target-size tools:

PNG is still over 100 KB after lossless optimization

The tool will automatically resize proportionally to reach 100 KB. If quality matters more than size, use the general PNG compressor instead.

Output looks smaller than expected

Resizing reduces dimensions, not quality. For a larger image, use a higher target size or the general PNG compressor.

Transparency is lost

Transparency is preserved in our compressor. If it's missing, the source may have been flattened before upload.

• W3C — PNG Specification
• oxipng — Lossless PNG optimization