Free · Secure · Runs locally

Online toolbox built for everyone

JSON, Excel, image tools, and desktop utilities — all free.
No signup, no install, no uploads.

Try JSON tools View all tools

All tools

Always improving — tell us what tools you need.

JSON tools

Format, minify, validate JSON with multiple indent options — local browser.

Excel tools

Merge sheets, split by sheet, Excel/CSV to SQL — deleted after processing.

Image tools

OCR and image compression, all local.

PDF Tools

Convert, merge, split PDF and watermark tools online

Developer Tools

Encode, hash, JWT, Cron and more utilities

Software downloads

FTP schedulers, test tools, and more.

View downloads →

Feedback

Request features and custom tools.

Leave feedback →

FAQ

FAQ

Everything you need to know about using ComTools safely, for free, and getting custom tools built.

QIs ComTools free?

Yes. Standard online tools on ComTools are completely free.

QIs my data uploaded?

JSON and image tools run locally in your browser. Excel merge/split/SQL uploads are processed temporarily and files are not kept.

QDo I need to register to use the tools?

No account is required for tools. Registration is only needed to post feedback.

QHow long are uploaded Excel files kept?

JSON and image tools run locally in your browser. Excel merge/split/SQL requires a temporary upload; files are deleted immediately after processing.

QCan I request a custom tool?

Yes. Tell us your needs on the feedback page. We can build custom tools for you; custom work may carry a reasonable fee while standard tools stay free.

QDoes the site use cookies or show ads?

We use Google Analytics to improve the product and may show third-party ads in the future. See our Privacy page for details.

Completely free

All online tools are free, forever.

Data security

Tools run locally; we keep no tool data.

Fast & reliable

Client-side, instant response, works offline.

Customizable

Tell us what you need — we can build it for you.