A Dremel works, but a file is better.

You can do it. It’s not a hack—it’s just slower and less precise than a proper chainsaw file.

The main problem is control. A Dremel spins fast, so it’s easy to take off too much metal or mess up the angle. Chainsaw chains need consistent depth and angle to cut well and stay sharp. With a file, you feel it and see it. With a Dremel, you’re guessing unless you use a sharpening attachment that locks the angle.

If you already have a Dremel and just want to touch up a mildly dull chain, sure—go for it. But if you’re doing the job regularly, buy a cheap file guide. It’s faster, cleaner, and the chain lasts longer.

Don’t use the Dremel on a brand-new chain. You’ll regret it.