DevTools.run Chrome Extension
50+ developer tools in your browser toolbar. JSON, regex, base64, hash, UUID, timestamps, CSS generators — everything one click away.
Instant Access
Press Alt+D or click the icon. Generate UUIDs, passwords, timestamps, and encode base64 without leaving your current tab.
50+ Tools
JSON formatter, regex tester, CSS grid/flexbox generators, hash calculator, JWT decoder, code formatter, and many more.
100% Private
All tools run client-side. No data collection, no tracking, no analytics. Your data never leaves your browser.
Quick Actions (built into popup)
These work instantly in the popup — no new tab needed. Results copy to clipboard with one click.
All Categories
Dev Tools
16 tools
JSON, Regex, JWT, Hash, Code Format, SQL, Crontab
CSS & Design
10 tools
Grid, Flexbox, Glass, Animations, Shadows, Palette
Converters
8 tools
Timestamp, Base64, URL, Image, Units, Timezone
Calculators
8 tools
Scientific, Percentage, Mortgage, BMI, GPA, Tip
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