Using a jigsaw safely and effectively comes down to three things: choosing the right blade, setting up your work properly, and letting the saw do the work while you guide it. A jigsaw is ideal for curved cuts, cut-outs, and shorter straight cuts in wood, plastic, and thin metal when used with the correct blade and safe technique.

What a jigsaw is

  • A jigsaw is a handheld power saw that moves a narrow blade up and down to cut wood, plastic, metal, and more, depending on the blade.
  • It’s especially useful for cutting curves, circles, and interior shapes that would be difficult with circular saws.

Safety first

  • Always wear safety glasses and, ideally, hearing protection and a dust mask when cutting.
  • Unplug a corded jigsaw or remove the battery before changing blades or making adjustments, and keep fingers clear of the blade path.
  • Clamp your workpiece securely to a stable surface so it cannot move or vibrate unexpectedly.

Setup: blade and machine

  • Choose the correct blade: coarse-tooth blades for wood, finer-tooth blades for metal or plastics, and narrow blades for tight curves.
  • Insert the blade with the teeth facing forward, making sure it clicks or locks fully into the clamp; give it a light tug to confirm it’s seated.
  • Adjust speed and any orbital-action setting according to material: more orbital action and moderate speed for thicker wood, less orbital and slower speed for cleaner, smoother cuts.

Marking and positioning the cut

  • Mark your cut line clearly with pencil or marker; use a straightedge or square when you need straight, square cuts.
  • Place the jigsaw’s base (shoe) flat on the material with the blade just in front of, not touching, the cut line before you pull the trigger.

Making the cut

  • Squeeze the trigger and let the blade reach cutting speed before easing it into the material; start slowly and then increase speed as you gain control.
  • Keep the shoe pressed firmly against the work and guide the saw steadily along the line, applying only gentle forward pressure so the blade does the cutting.
  • For straight cuts, run the shoe against a clamped straightedge or guide rail instead of trying to freehand long lines.
  • For curves, use a narrow blade, move slowly, and turn the saw gradually; make extra “relief cuts” into waste areas to avoid forcing the blade around tight bends.

Special cuts: circles, bevels, and cut-outs

  • To cut interior shapes, drill a starter hole inside the waste area large enough for the blade, insert the blade through, then follow your marked line.
  • For plunge-style starts, tilt the jigsaw forward, start it, then gently lower the moving blade into the material—only if your tool and blade are rated for that technique.
  • To cut at an angle (bevel), loosen the base adjustment, set it to the desired angle (commonly up to 45°), tighten it, then cut more slowly to maintain control and an accurate angle.

After the cut

  • Let the blade come to a complete stop before lifting the jigsaw away from the workpiece to avoid chipping or kickback.
  • Turn the tool off, unplug it or remove the battery if you’re leaving it unattended, and wait for the blade to cool before touching or changing it.

TL;DR: To use a jigsaw, choose the right blade, clamp your work, rest the shoe flat, start the saw before contacting the material, guide it gently along your marked line, and always prioritize safety.

Information gathered from public forums or data available on the internet and portrayed here.