Frequently Asked Questions
Common questions about FastDataTools, our privacy model, and technical capabilities.
General & Privacy
Is my data safe?
Yes. Absolute privacy is our core feature. Unlike most online converters, FastDataTools runs entirely in your web browser. When you "upload" a file, it is never sent to any server. It is read by JavaScript on your device, converted locally, and saved back to your device. We mechanically cannot see, store, or share your data.
What is FastDataTools?
FastDataTools is a suite of developer-focused utilities for transforming data between formats (like CSV, JSON, SQL, XML). Our goal is to provide a fast, ad-lite, and secure alternative to server-side conversion sites.
Technical Limitations
Is there a file size limit?
Since we process data in your browser's RAM, the limit depends on your device's available memory. Most modern laptops can handle files up to 100MB - 500MB without issues. If a file is too large (e.g., 2GB+), the browser tab may crash. For massive datasets, we recommend using command-line tools.
Why did my conversion fail?
Common reasons for failure include:
- Malformed Input: Syntax errors in JSON, broken CSV lines, or invalid XML tags.
- Encoding Issues: The file is not UTF-8 (e.g., specific Windows encodings).
- Browser Memory: The file was too large for your browser to hold in memory.
Which browsers are supported?
We support all modern "Evergreen" browsers: Chrome, Edge, Firefox, Safari, and Opera. Internet Explorer is not supported.
Support
How can I request a new feature?
We actively develop new converters based on user feedback. If you need a specific format pair (e.g., YAML to TOML), please contact us via our Contact Page.
Client-Side vs Server-Side?
Server-Side: You upload data, server processes it, you download result. Slow and risky.
Client-Side (Us): Browser downloads the "app", your computer processes the data locally. Fast and safe.