RGB Bitmap to BGR Bitmap

Swap Red and Blue color channels (RGB to BGR) for OpenCV, Windows DIB BMP files, and hardware displays. Instant client-side processing with zero server uploads.

Private • In-browser processing • Zero server uploads

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How to Use RGB Bitmap to BGR Bitmap

1
Upload Image
Upload or drag your PNG, JPG, or BMP image into the tool window.
2
Select Channels
Choose RGB to BGR (Red ↔ Blue swap) or another channel pair.
3
Preview Channels
Inspect the visual color change in real time on the live canvas.
4
Download Image
Click Download to save your channel-swapped bitmap image.

Key Features

OpenCV & BMP Compatibility
Rapidly fix inverted red/blue color channels from OpenCV pipelines and Windows DIB headers.
Multiple Channel Pair Swaps
Supports Red-Blue swap, Red-Green swap, or Green-Blue swap.
Mathematical Invertibility
Swapping twice cleanly restores the original pixel values with zero degradation.
100% Client-Side Privacy
Channel swapping is performed in local browser memory via typed arrays.

Common Use Cases

  • Fixing blue-tinted faces or inverted colors resulting from OpenCV cv2.imread() and cv2.imwrite() discrepancies.
  • Preparing raw pixel payloads for Windows DIB bitmaps and vintage framebuffers.
  • Converting textures for embedded graphics systems and microcontrollers (e.g. ST7789, ILI9341).
  • Creating surreal false-color artistic effects and channel manipulations.

Frequently Asked Questions

When OpenCV was originally developed in the early 2000s, BGR was the standard representation used by camera manufacturers and Windows DIB bitmaps, so OpenCV adopted BGR as its default native format.

Yes. Swapping channels is 100% mathematically lossless because the byte values are simply transposed without any lossy quantization or rounding.

No. The entire process runs strictly client-side inside your browser.

Change Bitmap Depth
Change a BMP image color depth: 1, 4, 8, 16 or 24 bits per pixel.
Extract Bitmap Color Palette
Extract and display the color palette from a BMP image.
Animate Bitmap Sprites
Turn a BMP sprite sheet into an animated preview with custom frame size and speed.
Symbols to Bitmap
Convert ASCII symbol art (#, ., X etc.) to a black-and-white BMP image.
Invert Binary Bits
Flip every bit in a binary string: 0→1 and 1→0 (bitwise NOT).