Free developer tools that run in your browser.
No accounts. No tracking. No data leaves your machine.
JSON, Base64, JWT, Regex — the essentials
4 tools →Transform, diff, and analyze text
4 tools →Hash, encrypt, and inspect security primitives
4 tools →Calculate, convert, and visualize numbers
4 tools →Color, typography, and layout tools
4 tools →DNS, IPs, headers, and connectivity
4 tools →Invoice, estimate, and manage — freelancer essentials
2 tools →Quick money math, tax, and compound calculations
3 tools →The tools people reach for most
Format, minify, and validate JSON with syntax highlighting
Encode and decode Base64 strings with URL-safe support
Generate strong passwords with customizable options and strength meter
Generate complementary, analogous, triadic, and monochromatic palettes with WCAG contrast checking
Live preview markdown with split-pane editor
Parse and inspect any URL into its components with decoded query params
Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files
Convert Unix timestamps to dates and back with multiple format outputs
Every tool processes input entirely in your browser. Nothing is ever sent to a server.
Zero cookies. No accounts. Privacy-first analytics that don't track individuals.
Instant results with no network latency. Works offline once loaded.