v136 · webgpu

Buffer Readback Tool

Write float values into a GPU source buffer, copy them using the new 2-argument copyBufferToBuffer(src, dst) overload (no offsets required), map the destination back to CPU, and compare byte-for-byte with the result of the classic 5-argument form.

WebGPU is not available in this browser. This demo requires Chrome 113+ with WebGPU enabled.

Enter data & copy

Comma-separated float values (up to 16):

Ready — click "Copy & Read Back" to run.

Results

new overload — Chrome 136+

copyBufferToBuffer(src, dst)

Run to see output

classic form — all Chrome

copyBufferToBuffer(src, 0, dst, 0, size)

Run to see output

Enter data & copy

Results

copyBufferToBuffer(src, dst)

copyBufferToBuffer(src, 0, dst, 0, size)

API comparison