Spark Plug

About Spark Plug

Spark Plug is a free, browser-based utility designed to make this task as quick and frictionless as possible. Processing runs locally in your browser using modern Web APIs. Nothing is uploaded, nothing is logged, and there is no quota to worry about for casual use. It is one of about a hundred utility tools that share the same philosophy: do one thing, do it well, get out of your way.

When you'd reach for Spark Plug

• You're cleaning up a folder of files that accumulated over a project and need to standardize them.

  Designers, writers, and developers wrapping up deliverables.

  Drop each file in, copy the output, move on.

• You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.

  Marketers and ops people whose primary tool is metered.

  Stay productive without burning credits.

• You need to handle a one-off task right before a meeting and don't have time to install anything.

  Anyone working remotely on a borrowed or restricted machine.

  Open the page, get the result, paste it into your doc — under a minute.

• You're on a public or shared machine and don't want to leave traces of what you're working on.

  Travelers, contractors, anyone working from a friend's computer.

  Nothing is uploaded, nothing persists if you're not signed in.

Frequently asked about Spark Plug

Does Spark Plug work on mobile?

Yes, Spark Plug is fully responsive and tested on iOS Safari and Android Chrome.

Is Spark Plug really free?

Yes — Spark Plug is free for unlimited personal use, with no account required and no watermark on the output.

Will Spark Plug change my original file?

Never. Spark Plug only reads your input file and produces a new output file.

Can I use Spark Plug commercially?

Yes. The output of Spark Plug belongs entirely to you, with no licensing restrictions.

Do I need to create an account to use Spark Plug?

No. Spark Plug works without any signup. We only ask for an email if you decide to subscribe to a paid plan.