About Creator Tool Lab

Creator Tool Lab provides free browser-based calculators and text utilities for creators, freelancers and small business teams. Our aim is to make routine calculations understandable: clear inputs, readable results and explanations of what each result means.

How the tools work

Free calculators, image processing and subtitle format conversion run on your device using JavaScript without an account. These local tools do not send your inputs or files to our servers. Live AI subtitle translation is separate: with your consent, subtitles are sent to our server, cue text to OpenAI, and your purchased license to Gumroad for verification. Read our privacy policy before using live translation.

Monetary outputs currently display USD; the formulas also work for GBP, CAD or AUD when every input uses the same currency. No currency conversion or tax calculation is performed.

Our content approach

Our guides explain each formula, show a worked example and describe practical limitations. We correct errors when identified. Last updated: October 10, 2026.

Funding

Free tools are supported by optional paid products: the US$9 offline Subtitle Batch Desk and a separate US$5 pack of 10 AI translation attempts. Display advertising may fund the service after approval. Advertising is currently inactive.

Estimates in the ad revenue calculator are scenarios, not income promises.

Read the tool guides → · Contact us →

More creator workflows

Batch image compression, subtitle conversion, video size and aspect ratio tools process files and calculations locally. Creator revenue, sponsorship and production calculators include worked examples and scenario exports.