hexabend

hxd, but for glitching images. open a photo, edit its raw bytes in a hex grid, watch the preview corrupt live.

running it

dotnet run --project src/PhotoHexEditor.App

Needs the .NET 10 SDK, Windows only (WPF).

how it works

Open an image, edit hex bytes in the grid, the preview updates as you type. Bad edits just show a "can't decode" badge instead of crashing.

BMP glitches best — uncompressed, so edits stay visible without breaking the file. JPEG works too if you edit past the header. PNG usually just fails to decode on edit.

• Ctrl+Z / Ctrl+Y — undo/redo
• Go to / Find — jump to an offset or search for a hex/ASCII pattern
• Select a range + Randomize/Invert/Fill/Shift — bulk-edit a chunk of bytes at once
• Apply Preset — auto-targets the pixel/scan data for BMP or JPEG and randomizes it

Nothing autosaves — "Save As..." writes to a new file and never touches the original.

project layout

src/
  PhotoHexEditor.Core/   models, view models — testable, no WPF
  PhotoHexEditor.App/    the WPF window
  PhotoHexEditor.Tests/  xunit tests
samples/                 sample.bmp for trying it out

running tests

dotnet test