Free
CSV to JSON converter
Convert delimited tabular text into formatted JSON arrays or objects in your browser.
Analysts, developers, designers and operations teams
Data & file tools
Convert structured data, build reusable code snippets and prepare small files in your browser. Handle everyday data transformations and web-ready outputs locally where the browser allows it. Review generated data before using it in production, especially when formats or downstream systems impose their own rules.
9free tools in this category.
Choose a tool
Clear inputs. Useful outputs.
Every result stays on your device unless a page explicitly says otherwise.
Free
JSON to CSV converter
Turn JSON arrays, objects or primitive values into spreadsheet-ready delimited text.
Free
HTML entity encoder & decoder
Encode reserved HTML characters or decode common named and numeric character entities.
Free
Number base converter
Convert exact whole numbers between bases 2 and 36, including binary, decimal and hexadecimal views.
Free
CSS clamp calculator
Generate a fluid CSS clamp() value between chosen sizes and viewport widths.
Free
Cron expression builder
Build and validate a common five-field cron expression with a plain-language summary.
Free
Markdown preview & HTML converter
Preview a focused Markdown subset and copy safely escaped HTML generated from it.
Free
Colour palette generator
Create a browser preview and CSS variables from a base colour, palette size and colour mode.
Free
Data URL generator
Turn text or a selected local file into a percent-encoded or Base64 data URL.
What this category helps with.
Start with the real question
Convert structured data, build reusable code snippets and prepare small files in your browser.
See the method
Inputs, formula or processing method, examples and important limitations are explained on every tool page.
Use the answer with context
Handle everyday data transformations and web-ready outputs locally where the browser allows it. Review generated data before using it in production, especially when formats or downstream systems impose their own rules. Tools give an estimate or transformation; you remain in control of the final decision.
Need a deeper workflow?
Move from a quick answer to a reusable business result.
The Premium suite adds 20 advanced forecasting, audit, data and document tools. Guests can try 1 run; a verified free account gets 3 per rolling 24 hours.