When you need to format a JSON response, decode a JWT or check a config file, where do you paste it? A lot of us use the first online tool that comes up in a search, without knowing whether that data is sent to a server or logged
That's the reason I built LocalOnly: 37 free developer tools that run entirely in your browser. JSON formatter and diff, JSONPath, YAML, CSV and XML converters, a JWT decoder, Base64, UUID, a PlantUML editor and more. Nothing you paste is uploaded, and it works offline once loaded.
37 free developer tools that run entirely in your browser: JSON formatter, diff, JSONPath, YAML, CSV and XML converters, JWT, Base64, UUID and a PlantUML editor. Nothing you paste is uploaded, it works offline, and share links keep your data inside the link
A free PlantUML editor that runs entirely in your browser. The official engine is compiled to JavaScript, so your diagram source is never uploaded. Live preview, PNG/SVG export, templates, share links and offline support. No account, no Java, no Graphviz.
A fast, privacy-first developer toolkit. Format, validate, convert and inspect JSON - plus dozens of developer utilities. Everything runs 100% in your browser. No uploads, no tracking, no backend.
