Other tools
Text comparison, syntax highlighting, and additional utilities that do not fit into a specific category. These tools are still built to the same standards: fully client-side, offline-capable, and free.
Text
Developer
Regex Tester
Test JavaScript regular expressions with live highlighting, capture groups, and replace preview.
Cron Parser
Parse cron expressions into human-readable descriptions and preview the next run times. Crontab generator, cron expression parser, cron schedule tester.
Markdown Preview
Preview Markdown live and convert Markdown to HTML. GitHub Flavored Markdown supported.
Color Converter
Convert any color between HEX, RGB, HSL, HSV, and CMYK. Check WCAG contrast and generate shades, tints, and harmonies.
WCAG Contrast Checker
Check the WCAG contrast ratio between any two colors. AA, AAA, AA Large, and UI component verdicts with auto-fix suggestions and best text color recommendation.
IP Subnet Calculator
Calculate IPv4 subnets from any IP and CIDR. Get network, broadcast, host range, netmask, wildcard mask, and usable hosts.
Htpasswd Generator
Generate .htpasswd files for Apache and nginx Basic Auth with bcrypt, SHA-1, or plain hashes.
Syntax Highlight
Convert source code to highlighted HTML for blogs, documentation, and CMS. Auto-detects language.
About others tools
Text compare highlights character-level and line-level differences between two inputs. It is used for reviewing changes, spotting subtle variations in configuration, and verifying that two files match.
Syntax highlight renders code with color for readability. It supports many languages and is useful when pasting code into documentation, tickets, or chat.
More tools will join this group as the site grows. If you have a request, the source is open and additions are welcome.