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/tools
Browser-based tools for data conversion, chart creation, and unit calculations. Everything runs locally in your browser — no data is sent to any server.
Convert between binary, decimal, hex, octal, ASCII, and text.
Convert length, weight, volume, temperature, speed, time, bytes, and more.
Parse, convert, filter, sort, and transform CSV data for spreadsheets and databases.
Create bar, line, pie, donut, and scatter charts — download as PNG.
F0X Tools is a collection of free, client-side utilities for working with data and numbers. All processing happens in your browser using JavaScript — nothing is uploaded, stored, or sent to a server. You can use every tool offline once the page loads.
The tools are grouped into four categories: number base converters for working with binary, hexadecimal, and octal values; unit converters for physical measurements across 12 categories; CSV tools for manipulating spreadsheet data without opening Excel; and chart makers for turning raw numbers into shareable PNG images.
Developers reach for the number converters when reading memory addresses, network masks, or color codes. Binary-to-hex and hex-to-binary are particularly common when debugging protocols or working with bitfields.
Data analysts use the CSV tools daily. Converting a CSV export from a database into JSON for an API, or into SQL for a quick import script, takes a few seconds here instead of writing a one-off script.
Students and engineers use the unit converters for physics problems, lab reports, and cross-system calculations. The pressure, torque, and power converters cover units that most general-purpose tools skip.
Presenters and content creators use the chart maker to produce clean PNG charts for slides, reports, and social posts without needing a spreadsheet application or a design tool.
Most conversion tasks do not need a server. Sending CSV data containing customer names or financial figures to a third-party service to get back JSON introduces unnecessary risk. Browser-based tools eliminate that risk entirely because your data never leaves your device.
Speed is the other benefit. There is no round-trip to a server and no queue. The output appears as fast as JavaScript can run, which for most conversions is under a millisecond. Large CSV files with thousands of rows convert in the same time as small ones.
The tools also work without an account. There is no login, no email verification, and no free-tier limit. Every tool on this site is free to use as many times as needed.
Is my data safe when using these tools?
Yes. All conversions run entirely in your browser. No data is sent to any server. You can verify this by disconnecting from the internet after the page loads — every tool still works.
Do the chart images contain any tracking or metadata?
No. The PNG files are generated using html2canvas from your browser. They contain only your chart data, rendered to pixels — no embedded metadata, watermarks, or tracking pixels.
Can I use these tools on mobile?
All tools are designed to work on mobile browsers. The unit converters and number converters work well on small screens. The CSV tools and chart makers are best used on a tablet or desktop where more screen space is available.