Tool collections
These topical hubs group related utilities and link to in-depth guides. Every tool processes your input in the browser — nothing is sent to LocalTools servers for processing.
JSON & data format tools
Format, validate, and convert JSON, YAML, XML, TOML, CSV, and GraphQL in your browser. No uploads — your data stays on your device.
14 tools
Text & document tools
Case conversion, slugify, line sorting, diff, Markdown preview, and more — free text utilities that run entirely in your browser.
15 tools
Security & crypto tools
JWT debugger, TOTP, AES-GCM, RSA keys, password strength, and secret sharing — all in-browser. Secrets and tokens never leave your device.
12 tools