Developer Tools
InspectSpecificity, play with Flex/Grid, calculate layout, compare files.
Code Diff Viewer
Compare code listings side-by-side highlighting line additions and updates.
Syntax Highlighter
Paste raw code to highlight syntax, copy beautiful, formatted HTML files.
Character Escape Tool
Escape HTML, JavaScript, and JSON strings for raw variables.
HTTP Header Analyzer
Parse and inspect raw key-value headers to identify security and cache configurations.
Timestamp Converter
Interconvert unix epoch integers and human date strings.
String Hash Visualizer
Convert a string to a unique visual identicon hash signature.
CSS Specificity Calculator
Calculate specificity weights of CSS selectors, listing ids, classes, and elements.
Flexbox Visual Playground
Experiment and generate CSS properties for flex direction, alignments, and gap spaces.
CSS Grid Visual Playground
Experiment and generate code for column tracks, row alignments, and gap layouts.
Aspect Ratio Calculator
Compute dimension proportions, scaling width and height parameters.
Pixels to REM Converter
Convert pixels to rem and em sizes relative to standard font settings.