How to reduce PNG file size

1. 01Identify the content. Keep screenshots with readable text, logos and graphics in PNG to start. For a photo, consider JPG exported from an editor or WebP where accepted.
2. 02Check pixel dimensions and resize a copy in your editor if it is larger than the destination needs. Crop genuinely unnecessary areas before uploading.
3. 03Compress the prepared PNG with Bitinz, keeping the format. Start with Balanced, then compare Best from the same prepared source when you want to try a smaller result. Keeping PNG never delivers a file larger than your upload.
4. 04Where accepted, compare PNG to WebP with the compressed PNG. WebP conversion is lossy, so inspect the picture as well as the file size.
5. 05Check small lettering, thin lines and smooth gradients. Place transparent objects on their intended background to inspect the edges before replacing the original.

• Photographic detail and noise. Leaves, hair, fabric and camera noise create many small changes across the picture. PNG can store these accurately, but a photo format often stores the image more compactly.
• Many colours and smooth gradients. A simple logo may be compact as PNG, while a detailed illustration or soft shadow carries more varied image data. Compare actual exports rather than judging by the filename.
• High bit depth. A 16-bit PNG can store more colour information per channel than an 8-bit PNG. If your editor offers a lower-bit-depth export, compare its colours and gradients before choosing it.
• More pixels than the destination needs. Check width and height in the file, not just its apparent display size. Resizing a working copy is useful when the source is much larger than its intended use.

A high-density screenshot can contain more physical image pixels than its CSS display dimensions suggest. At a device pixel ratio of 2, a capture at native resolution can have twice the width and height of its CSS display area. Check the saved file's actual dimensions; screenshot tools and capture settings vary.

These examples were tested on 2026-10-23, using Balanced at unchanged dimensions for both outputs. Sizes use 1 KB = 1000 bytes and are rounded; the small graphic uses exact bytes, shown as B. These are examples from our test images; your files will differ.

Compressed PNG is smaller for the monochrome graphic, while WebP is smaller for the photo. Check the picture as well as the size, especially lettering, gradients and transparent edges.

• The image has the pixels its intended use needs.
• Text and fine lines remain readable at the intended display size.
• Smooth gradients have no distracting visible steps.
• Transparent edges look right on the intended background.
• The destination accepts the chosen format and supports any required transparency.
• You have compared the actual file sizes and kept the original.

See lossy vs lossless compression for the quality trade-off. For unchanged files or a conversion notice, use the compression troubleshooting guide.