Best of
The best free tools for developers (no account required)
These are the tools that stay open in a tab all day. All are free, four of them work offline, and none require an account to start.
01DevDocsA hundred documentation sets behind one search box, cached for offline use.
02GitHubUnlimited private repos and 2,000 CI minutes a month.
03Stack OverflowStill the fastest answer for an exact error string — check the date.
04Can I UseBrowser support answers without reading MDN tables.
05JSON FormatterFormat and validate JSON locally, nothing uploaded.
06CodePenSketch a front-end idea in seconds and share the URL.
How we picked
Each tool had to pass one test: finish a realistic job on the free plan without hitting a paywall mid-task. Products that only offer a time-limited trial with a card requirement were excluded, which is why several well-known names are missing. Prices and limits change — every entry links to its own page with the checks we ran.
Which of these work offline?
DevDocs, the JSON formatter and the password generator all run without a connection once loaded.