Autopen Signature Tool

Draw a signature below to see it encoded using the Autopen format—a compact binary serialization with delta encoding and arithmetic compression. The decoded output shows the round-trip result.

Draw Signature

Decoded Output

SVG Render

SVG rendering options
Range: 64 to 2048 pixels
Range: 32 to 1024 pixels
2
0.5
Smooth curves using Catmull-Rom spline interpolation
Add solid background color to SVG output
Scale to fit signature content instead of full canvas
5%

Encoding Output

Raw (uncompressed)

0
0 bytes payload

Final (with arithmetic)

0
0 Z85 chars
Encoding Breakdown:
Delta (2B): 0 | Absolute (3B): 0 | Strokes: 0
Draw a signature...