checker

Describe your Cloudflare Pages setup and get a checklist report flagging missing pieces and common misconfigurations.

Enter your production domain and pages.dev project name to get a duplicate-content risk report and the exact fixes.

Check whether a file is a valid PNG, whether it's animated, and report its frame count, loop count, and timing.

Calculate the alpha-weighted average color of every pixel in a PNG.

Upload a PNG to check it as a valid image; barcode symbology decoding is honestly unsupported client-side.

Highlight every pixel matching a chosen color in a PNG by dimming everything else to grayscale.

Sort a list of hex colors by hue, lightness, saturation, or perceptual luminance.

Highlight every near-grayscale pixel in a PNG in solid red, right in your browser.

Sample the exact RGBA color of any pixel in an uploaded icon, right in your browser.

Extract an icon's most common colors as a ranked hex-code list, right in your browser.

Read the exact RGBA and hex color of any pixel in a logo, entirely in your browser.

Find a logo's dominant colors and their share of the image, entirely in your browser.

Extract the single most frequently occurring color in a PNG.

Extract the most common colors in a PNG as a ranked list of hex codes.

Pick the exact RGBA color of any pixel in a PNG by entering its x/y coordinates.

Check whether a PNG is truly grayscale by scanning every pixel's RGB values.

Check whether a PNG is landscape, portrait, or square with a single clear answer.

Preview a PNG composited over several background colors side by side, all in one pass.

Check whether a PNG file is structurally valid by verifying its signature, chunks, and checksums.

Check whether a PNG has any transparent or semi-transparent pixels, and how many.

Get a comprehensive pass/fail verdict on whether a file is a well-formed PNG, with a full chunk breakdown.

Verify whether a file is a genuine PNG by checking its signature and IHDR chunk structure.

See exactly which parts of a PNG are transparent by highlighting them in magenta, right in your browser.