Hole Template & Bolt Pattern

Replacing a bracket, a hinge, or a speaker plate? The holes are the hard part.
Measure them one by one with a ruler and the errors stack up until the last
hole is off. HoleCopy does not measure the old part — it copies the pattern.
Print the free reference sheet, lay the old part on it, take one photo. The
app corrects the perspective, finds every round through-hole, and gives you
its center and diameter in real millimetres.

HOW IT WORKS
1. Print the A4 or US Letter reference sheet at 100% (free)
2. Lay the old part on the sheet and take one photo
3. HoleCopy squares up the photo and detects the holes
4. Check the result on screen — move a center, resize a hole, add one the
camera missed, delete one it invented
5. Export a true 1:1 PDF or SVG, tape it to the new material, and drill

BUILT FOR THE WORKSHOP, NOT JUST THE PHOTO
- Patterns bigger than one sheet split across pages, with overlap and
alignment marks so you can tape them together accurately
- Mirror the template for the back side of a part
- Export SVG to bring the pattern into a vector program
- Every page carries a 100 mm and 1 inch check bar, so you confirm your
printer did not scale the page before you trust the template
- All processing happens on your device — photos never leave it

WHO IT IS FOR
Furniture repair, woodworking, and metalworking DIY. Swapping brackets,
hinges, handles, or table legs. Building speaker cabinets or control panels.
Mounting brackets on a car or motorcycle. Copying gasket or flange hole
patterns.

FREE TO TRY, PAY TO EXPORT
Capturing the photo, correcting perspective, detecting and editing holes,
and previewing the output are all free — printing the reference sheet is
free too. Saving, sharing, or AirPrinting the actual-size PDF or SVG
requires a one-time purchase. No subscription, no ads, no account.

BEFORE YOU DRILL
HoleCopy works with flat parts and round through-holes 3 mm and larger,
where the part and the reference sheet fit in one photo. It is a
positioning aid, not a guarantee of precision — always confirm the printed
check bar measures exactly 100 mm, and drill a small pilot hole first when
it matters. Not intended for safety-critical parts.