01
Avoid entering passwords, private keys, production tokens, customer records, personal IDs, medical data, financial data, or confidential company material.
Data handling
Know what stays local and what should stay out.
FreeToolsBox is designed around browser-first transformations for small developer snippets. This page explains the practical processing model and the safety boundary for online tools.
02
Use sanitized snippets when debugging and keep production data in trusted internal systems.
03
Analytics, ads, CDN, verification, and browser infrastructure can still process normal web request metadata even when a tool transformation runs locally.
Tool-by-tool matrix
Processing matrix
Use this matrix to decide whether a sample is appropriate for a browser tool. When in doubt, sanitize first or keep the workflow inside your own environment.
| Tool | Input | Processing model | Avoid entering |
|---|---|---|---|
| JSON Formatter | Textarea input | Parsed and formatted in the browser | Avoid entering tokens, emails, IDs, and customer records before pasting. |
| Base64 | Text snippets | Encoded and decoded in the browser | Base64 is readable by anyone; it is not encryption. |
| JWT Decoder | Token-like strings | Header and payload decoded in the browser | Avoid production bearer tokens; decoding does not verify signatures. |
| Regex Tester | Pattern and sample text | Tested with the browser JavaScript RegExp engine | Avoid private logs or regulated text. |
| Hash Generator | Text snippets | Digest generated in the browser | Plain hashes are not password storage algorithms. |
| URL Encoder | URL components | Encoded and decoded in the browser | URLs can leak through logs, browser history, and referrers. |
| Timestamp Converter | Dates and numeric timestamps | Converted in the browser | Check timezone assumptions before using deadlines. |
| Password Generator | Generation settings | Random values generated with browser crypto APIs | Store generated passwords in a trusted password manager. |