Layer Mask Encoder — 32x32 PNG → 1-bit (128 bytes)

Upload a **single** layer PNG (32×32). Alpha > 0 = pixel “on”. Output is a base64 string of 128 bytes (row-major, 8 px/byte, MSB-first). Send me the four outputs for L1..L4 (bottom→top) and I’ll merge them into the final 268-byte RLE.
Pixels with alpha ≥ threshold are ON.
Waiting for file…
Decoded length: 128 bytes • Format: 32 rows × 32 cols, row-major left→right, top→bottom, 8 pixels per byte, **bit 7 = leftmost**, bit 0 = rightmost of each 8-pixel group.