Is WhiteKit free to use?
Yes — every tool is free, with no sign-up and no usage limits.
Developer tools that never leave your browser
55 formatters, converters, and generators across 7 categories — JSON, Base64, JWT, regex, hashes, subnets. Every tool runs client-side; nothing you paste is sent to a server. No sign-up, no ads slowing you down.
Formatters
JSON Formatter
Format, validate, and minify JSON data.
Converters
Base64
Encode text to Base64 or decode Base64 safely.
Security
JWT Decoder
Inspect JWT headers and payloads without verification.
Utilities
UUID Generator
Generate one or more UUID v4 values.
Reference
HTTP Status Codes
Look up common HTTP response codes and meanings.
Network
IPv4 Subnet Calculator
Calculate network/broadcast addresses, host ranges, and VLSM splits from a CIDR block.
Text
Text Diff
Compare two blocks of text by character, word, or line.
Utilities
Regex Tester
Test JavaScript regular expressions against text.
FAQ
Is my data uploaded anywhere?
No. Every tool runs entirely client-side in your browser — nothing you paste, upload, or generate is sent to a server, logged, or stored.
How many tools does WhiteKit have?
55 tools across formatters, converters, security, utilities, reference, network, and text — browse them all on the Tools page.
Do I need to create an account?
No account and nothing to install. Open a tool and start using it immediately.