How to Convert HEIC to PNG

What this HEIC to PNG converter does

HEIC and HEIF store image data in formats commonly produced by phones and cameras. PNG is a different image format that may be needed by a later image-processing or content workflow. This converter is intended for situations where you already have the source image data and want PNG image data as the result.

The input is not described as a file picker action here. Instead, provide the image data as base64 text. Base64 is a text representation of the source bytes, so the value you submit should correspond to the HEIC or HEIF image you want to convert. The conversion is successful only when the supplied image can be opened and PNG encoding completes successfully.

How to convert HEIC or HEIF data to PNG

1. Obtain the HEIC or HEIF image bytes you want to convert. Make sure you are working with the intended source image rather than a previously converted result.

2. Encode those image bytes as base64 text. The complete value produced by that encoding is the image input for the conversion. Do not substitute a file name, a description, or unrelated text for the encoded image data.

3. Submit the populated image input to the converter. Check that the value is present before submitting it. An empty image input causes the operation to fail, so leaving the input blank does not request a conversion of a missing file.

4. Read the returned value after the operation completes. When the source image can be opened and PNG encoding succeeds, the result is base64-encoded data representing the converted PNG image.

5. Keep the source value and the returned value separate while you work. The first is the base64 representation of the HEIC or HEIF input; the second represents the PNG result. This separation helps you pass the converted data to the next step without accidentally submitting the original source again.

6. Decode the returned base64 value when the next part of your workflow requires PNG bytes rather than text. Use the decoded result as the PNG data for that next step. The converter’s successful result is the encoded representation, while decoding is the separate action that turns it back into bytes for downstream use.

How to interpret the result

A successful result is base64-encoded data representing a PNG image. It is not an image description and it is not the original HEIC or HEIF value. If the next destination accepts PNG bytes, decode the returned base64 data before passing it on. If that destination accepts base64 image data, keep the returned value in its encoded form as appropriate for that workflow.

A failed operation does not establish that the source image is a valid, processable HEIC or HEIF image. First consider whether the submitted value was empty or whether it was actually base64-encoded image data. Then consider whether the decoded bytes can be opened as an image. A failure may also occur during decoding, opening, or PNG encoding because of an unexpected error. These boundaries mean the converter is a conversion step whose result depends on the supplied data being processable; it is not a guarantee that every HEIC or HEIF input will convert.

When checking a result, distinguish the format of the returned data from the format it represents. The returned value is base64 text, and the image represented by that value is PNG. That distinction matters when saving the result, transferring it to another service, or handing it to a component that expects raw image bytes. If the operation fails, correct the input or address the processing problem before treating the result as PNG data.

Worked example

A person has a HEIC photo received from a mobile upload and needs PNG image data for a later processing step.

Encode the photo bytes as base64, submit that value as the image input, and inspect the returned base64 value.

A successful response has base64-encoded data representing the converted PNG image.

Limitations

• Conversion can fail when the supplied bytes cannot be opened as an image or when decoding, opening, or PNG encoding encounters an unexpected error.
• An empty image input fails instead of producing a PNG result.

Common errors

• Cause: the image input is empty or contains something other than base64-encoded HEIC or HEIF image data. Correction: encode the intended image bytes as base64 and submit the resulting value.

FAQ

What happens if I leave the image input empty?

The operation fails instead of producing a PNG when the image input is empty. Supply base64-encoded HEIC or HEIF image data before submitting the conversion.

What does a successful result contain?

When conversion succeeds, the result contains base64-encoded data representing the resulting PNG image. Decode that value when another workflow needs the PNG bytes.

Why can a HEIC to PNG conversion fail?

The conversion fails if the supplied bytes cannot be opened as an image, and unexpected problems during decoding, opening, or PNG encoding can also cause failure. Check the source bytes and their base64 representation before submitting the data again.