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10 free tools · 100% in your browser

The Data Toolbox
for analysts & engineers

Generate mock data, convert CSV and JSON, clean messy files, profile datasets and format SQL, instantly, with nothing uploaded.

10 tools0 data leaves your browserNo signup

Pick a tool

Wrangle CSV, JSON and SQL locally, perfect for quick data tasks and prototyping.

Every tool on its own page

All 10 tools of the Data Toolbox, each with how to use it, a worked example and answers to common questions.

Mock Data GeneratorCSV to JSON ConverterCSV CleanerJSON QuerySQL FormatterData ProfilerMarkdown Table GeneratorNumber StatsJSON Validator and MinifierRemove Duplicate Lines
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Used the tools? Now learn, build and earn with us.

2.4M+ learners and professionals in 105+ countries grow with CareerByteCode. Learn from the freelancers below, pick a course or a live cohort, or start earning yourself: as a creator selling your own courses and services, or as an influencer earning on every sale you refer.

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FAQ

Questions, answered

Are the Data Toolbox tools free to use?
Yes. Every tool here is free, private, and runs entirely in your browser, with no signup and nothing uploaded to a server.
Is my data safe when I use these tools?
Yes. Mock data, CSV to JSON, SQL formatting, and profiling all run locally in your browser, so your files never leave your device.
Do I need an account or to install anything?
No account and no install. Open the page and start using it. The tools keep working even offline once the page has loaded.
How does CareerByteCode help my career beyond these tools?
Join the community for mentorship, grow your personal brand, and freelance under the CareerByteCode brand with a 55% to 80% revenue share. Join the community.

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