Why do I need to enter width and height?

A raw BGRA dump stores no dimensions of its own; the tool needs the original width and height to know where each row of pixels starts and ends.

What happens if my byte count doesn't match width x height x 4?

The tool rejects the file with an error stating exactly how many bytes it expected, since a mismatched count means the data can't be a valid BGRA dump at those dimensions.

Does this preserve transparency?

Yes — the fourth byte per pixel is alpha, carried through exactly from the raw dump into the reconstructed PNG.

What if my colors come out swapped?

That means your source data was actually RGBA, not BGRA — try the RGBA to PNG converter instead, since using the wrong converter swaps red and blue in the result.

BGRA to PNG Converter - Rebuild a PNG from Raw BGRA Bytes

Overview

Introduction

This tool rebuilds a viewable, transparency-preserving PNG from a raw BGRA pixel byte dump, entirely in your browser, swapping the blue-first channel order back to the RGBA the canvas API expects internally.

Since a raw dump carries no dimension metadata, you supply the original width and height and the tool reassembles rows from the flat byte sequence.

What Is BGRA to PNG Converter?

A client-side raw-BGRA-to-PNG converter that reads a headerless byte file (4 bytes per pixel: blue, green, red, alpha), reconstructs a pixel buffer with corrected channel order, and paints it to a canvas for download as a PNG.

It's the exact inverse operation of the PNG to BGRA converter.

How BGRA to PNG Converter Works

The tool validates that the uploaded byte count exactly equals width times height times 4; any mismatch is rejected with a specific expected-byte-count error.

For each 4-byte group it writes red (from the third byte), green (second byte), blue (first byte), and alpha (fourth byte, unchanged) into a new RGBA pixel buffer.

When To Use BGRA to PNG Converter

Use it to visualize a raw BGRA frame captured from Windows GDI/DirectX, a GPU texture readback, or camera hardware that outputs BGRA by default.

It's also useful for verifying a PNG-to-BGRA export round-trips correctly by converting it back and comparing.

Often used alongside PNG to BGRA Converter, BGR to PNG Converter and RGBA to PNG Converter.

Features

Advantages

Runs entirely client-side; no upload to a server.
Validates the byte count up front with a specific, actionable error message.
Correctly reorders channels back to RGBA, preserving transparency while fixing the red/blue swap.

Limitations

Requires knowing the exact width and height the raw dump was captured at.
Expects exactly 4 bytes per pixel; feeding it a 3-byte-per-pixel BGR dump will fail the byte-count check.

Examples

Visualize a DirectX surface readback

Input

A 4,096-byte raw BGRA file, width 32, height 32

Output

A viewable 32x32 PNG with correct colors and transparency

4,096 bytes divides evenly into 1,024 pixels of 4 bytes each, matching the declared dimensions, with channels reordered back to RGBA.

Reject a truncated file

Input

A 1,000-byte file with width 32, height 32 (expects 4,096 bytes)

Output

An error: "Expected 4096 bytes...but got 1000."

The byte-count check catches truncated or mismatched dumps before any garbled image is produced.

Best Practices & Notes

Best Practices

Double-check the width and height against however the raw BGRA file was originally captured.
If colors look swapped, confirm your source data is actually BGRA and not RGBA before troubleshooting further.

Developer Notes

The pure reconstruction logic lives in a lib function that validates the byte count against width x height x 4 before touching any DOM, then writes red/green/blue in corrected RGBA order (keeping alpha unchanged) into a freshly created PixelBuffer.

BGRA to PNG Converter Use Cases

Visualizing a raw BGRA frame captured from Windows GDI/DirectX or camera firmware
Round-trip testing a PNG-to-BGRA export pipeline
Recovering an image from a headerless BGRA pixel dump when dimensions are known

Common Mistakes

Entering the wrong width/height, which produces a garbled, skewed image even though every byte is technically valid.
Using this converter on data that's actually RGBA, which swaps red and blue in the output.

Tips

If you're not sure whether your data is RGBA or BGRA, try both converters and see which produces natural-looking colors.
Keep the byte-count error message handy — it tells you exactly how many bytes were expected for your entered dimensions.

BGRA to PNG Converter