About The Data Toolkit
A developer tools hub built around one principle: your data stays in your browser.
The origin of the project
The project started as a JSON toolset — validator, formatter, diff, schema generator. During API development and backend integrations, these tasks are routine and take a disproportionate amount of time when the available tools don't fit the workflow.
The bigger problem with existing online tools is their processing model: most send your data to a remote server. In contexts where payloads contain authentication tokens, sensitive production data, or internal database schemas, this is an unacceptable security risk.
The solution was to build everything client-side — processing in the browser itself with zero network traffic. The project grew beyond JSON: today The Data Toolkit covers API tools (cURL converter, JWT decoder, API mock, and more), SQL (formatter, minifier), and JSON (8 tools). The catalog keeps expanding.
Why client-side?
Three principles that guide the technical decisions of this project.
Real privacy
Your data never leaves your browser. No uploads, no telemetry, no middle server.
Maximum speed
No network latency. Processing is instant, running directly on your device.
Simple to use
Clean interface, no distractions. Bring your data and get the job done — nothing more.
Try it now. No signup, no account, no uploads.
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