FastImageToolsFastImageTools

PNG Transparency Checker

Check whether a PNG encodes transparency through an alpha channel or a tRNS chunk. The inspection runs locally in your browser, and the original file is not uploaded by this tool.

Local processingJSON reportNo sign-up

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JPGPNGWebPAVIFGIFSVGHEICTIFFBMPRAW
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•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

Check whether a PNG encodes transparency through an alpha channel or a tRNS chunk.

The report distinguishes PNG color type, alpha-channel support, palette transparency, bit depth, and APNG status so that a transparent encoding is not confused with a visually white background.

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 report distinguishes PNG color type, alpha-channel support, palette transparency, bit depth, and APNG status so that a transparent encoding is not confused with a visually white background.

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?

Transparency in the file does not guarantee that every pixel is transparent. The checker reports encoded alpha capability and does not remove or create a background.

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