UUID Generator
Generate up to 100 random version 4 UUIDs.
Open toolThe little utilities
you reach for often.
Calculate, generate a password, convert length and color formats, or encode HTML text.
Everyday utilities
7SHA-256 Text Hash
Calculate a SHA-256 digest of UTF-8 text locally.
Open toolTech Calculator
Fast calculator with common operators.
Open toolRandom Password Generator
Generate passwords with a secure browser random source.
Open toolLength Converter
Convert length units quickly and accurately.
Open toolColor Converter
Convert between HEX, RGB, and HSL color formats.
Open toolHTML Entity Encoder
Encode or decode HTML entities safely.
Open toolSmall tasks deserve focused tools
The calculator supports basic expressions. The length converter translates between supported units. The color converter works with HEX, RGB, and HSL representations. The HTML entity tool encodes or decodes text that contains characters with special meaning in markup.
The password generator uses the browser’s secure random source. Use a unique password for each service and save it in your preferred password manager. Generating a random string is not the same as storing it securely or protecting an account with additional authentication.
Understand what a conversion preserves
A unit conversion changes the representation of a measurement, not the accuracy of the source measurement. A rounded input cannot become more precise because the output displays more decimal places. Similarly, converting a color value does not guarantee that every display will render it identically.
HTML entity encoding is a text operation. The correct protection for an application depends on where the value will be used: HTML text, an attribute, a URL, or JavaScript each has different handling requirements. This tool is not a general HTML sanitizer.
Before copying the result
- Check the input format and selected units.
- Use a simple example with an answer you can verify.
- Check rounding and the destination system’s expectations.
- Keep confidential source data out of public web tools.
For a conversion that is not listed, send a suggestion with the source format and the result you need. For percentages and statistics, open the Maths tools category.