OCR

PNG to JSON with OCR

AlphaPDF Pro: $99/year · $12/month

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Recognize PNG content and export JSON with AlphaPDF Premium. Select languages and review the recognized result.

What to expect

Export recognized page text and blocks with bounding boxes and confidence values for downstream processing. PNG preserves sharp edges without JPEG compression; crop unrelated borders before uploading and keep the full text in view.

Confidence is a recognition signal, not proof of accuracy. Validate the schema and key values before an automated import. Proofread names and numbers; handwriting is best-effort.

Start PNG to JSON with OCR

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Output quality is under review. This tool is not currently recommended as a reason to purchase Pro. Check all output against the source.

What it does

This tool reads the text in a PNG image and gives it back as JSON data. Every block of recognised text is listed with its position on the page and a confidence score, so software can pick out fields or flag weak readings for a person to check. PNG images are often screenshots or exports from a scanner. They keep sharp edges without the blur that JPEG compression adds, which helps recognition. Crop away borders and anything that is not part of the page.

When to use it

Pick this when software needs the text and position of each block in PNG images, for example to check screenshots in automated tests, index images in a library or capture data from exported forms.

How to use PNG to JSON with OCR

Sign in with an account that has Premium access.
Upload .png files. Each file can be up to 50 MB, with up to 25 files per batch.
The output is set to JSON. Select the recognition languages and scan cleanup options. Review the available settings and choose a 1, 7 or 30-day retention period.
Start the job, then download and check the result before its retention period ends.

Related conversion options

Before you start

Confidence is a recognition signal, not proof of accuracy. Validate the schema and key values before an automated import. Proofread names and numbers; handwriting is best-effort.

If your images always follow the same layout, note where each field usually sits. Matching on position is often more reliable than matching on the text alone. Recognition is never perfect. Names, amounts and dates deserve a careful check, and handwriting is read on a best-effort basis. Select every language on the page so the right characters are expected.

Processing limits

Up to 50 MB per input; 25 files and 500 MB per batch. PDF limit: 2000 pages. Up to 2 active jobs per account. Output limit: 1000 MB. Renderer limits can reject especially large pages or images.

Example output

An inspected example is not available for this tool yet. Review the supported formats and limitations before processing.

Common questions

Can I map text back to the image?

Each block comes with its position on the image, so you can highlight or crop the area it came from. Check the file for the exact field names.

Can I upload a screenshot?

Yes. Screenshots of documents work well as long as the text is large enough to read comfortably on screen.

What does the confidence score mean?

It shows how sure the recognition was about a block. A low score is a good reason for a human check. A high score is not proof it is right.

Which languages can it read?

Choose the languages from the list before you start. Recognition works best when every language on the page is selected.