FastImageToolsFastImageTools

PNG Format Inspector

Inspect PNG color type, bit depth, transparency, interlace, profile, text, and APNG information. The inspection runs locally in your browser, and the original file is not uploaded by this tool.

Local processingJSON reportNo sign-up

Drag & drop your images

or click below to browse your files

JPGPNGWebPAVIFGIFSVGHEICTIFFBMPRAW
⌘VPaste from clipboard
•Drag from Finder or Photos

Free users: up to 15 images at once • Premium: unlimited batch processing

Back to Inspect Image Format, Metadata, and Compatibility

What this inspection checks

Inspect PNG color type, bit depth, transparency, interlace, profile, text, and APNG information.

The parser reads recognized PNG chunks in the available inspection window and reports IHDR fields, alpha or tRNS transparency, palette information, sRGB or ICC presence, and APNG frame data when found.

How to inspect the image

  1. 1

    Choose an image

    Select one or several supported image files from your device.

  2. 2

    Review the detected fields

    Open the format details and integrity tabs to review the values found in the file structure.

  3. 3

    Keep the result

    Copy the report or download it as JSON. The original image is not changed.

Frequently asked questions

What does this checker report?

The parser reads recognized PNG chunks in the available inspection window and reports IHDR fields, alpha or tRNS transparency, palette information, sRGB or ICC presence, and APNG frame data when found.

Is my image uploaded?

No. This inspection runs in your browser and does not upload the original image.

Does the checker modify the image?

No. It reads technical fields and produces a report; it does not convert, repair, or rewrite the file.

Is the result a complete file validation?

Very late chunks beyond the inspection window may not be listed. This is a technical report, not a full CRC validator or PNG repair tool.

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Read the encoded bit depth reported by supported raster image structures.

Image Extension Mismatch Checker

Compare a known filename extension with the image format detected from the file signature.

Progressive JPEG Checker

Check whether a JPEG uses progressive scans or baseline encoding.

GIF Frame Counter

Count frames in a GIF and inspect its animation timing, loop setting, palette, and transparency.

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