# Kitlog — Free Developer Tools > Free online developer tools. All processing is done client-side in the browser. ## About Kitlog provides 20+ free developer tools including JSON formatters, encoders, generators, and converters. All tools work entirely in the browser — no data is sent to servers. Tools are also accessible via API at https://kit.logscrap.com/api/tools/{slug} ## Tools - [JSON Formatter](https://kit.logscrap.com/tools/json-formatter): Format, validate and beautify JSON data - [JSON to CSV](https://kit.logscrap.com/tools/json-to-csv): Convert JSON arrays to CSV format - [Base64 Encode / Decode](https://kit.logscrap.com/tools/base64): Encode and decode Base64 strings - [URL Encode / Decode](https://kit.logscrap.com/tools/url-encoder): Encode and decode URL components - [HTML Encoder / Decoder](https://kit.logscrap.com/tools/html-encoder): Encode and decode HTML entities - [JWT Decoder](https://kit.logscrap.com/tools/jwt-decoder): Decode and inspect JWT tokens - [UUID Generator](https://kit.logscrap.com/tools/uuid-generator): Generate UUIDs v4 in bulk - [Hash Generator](https://kit.logscrap.com/tools/hash-generator): Generate MD5, SHA-1, SHA-256, SHA-512 hashes - [Regex Tester](https://kit.logscrap.com/tools/regex-tester): Test and debug regular expressions - [Timestamp Converter](https://kit.logscrap.com/tools/timestamp-converter): Convert between Unix timestamps and dates - [Color Converter](https://kit.logscrap.com/tools/color-converter): Convert between HEX, RGB, HSL color formats - [Number Base Converter](https://kit.logscrap.com/tools/number-base-converter): Convert between binary, octal, decimal, hex - [Text Case Converter](https://kit.logscrap.com/tools/text-case-converter): Convert text between different cases - [Word Counter](https://kit.logscrap.com/tools/word-counter): Count words, characters, sentences, and more - [Lorem Ipsum Generator](https://kit.logscrap.com/tools/lorem-ipsum): Generate lorem ipsum placeholder text - [Password Generator](https://kit.logscrap.com/tools/password-generator): Generate secure random passwords - [Diff Checker](https://kit.logscrap.com/tools/diff-checker): Compare two texts and highlight differences - [Cron Expression Builder](https://kit.logscrap.com/tools/cron-builder): Build and explain cron expressions - [CSS Unit Converter](https://kit.logscrap.com/tools/css-unit-converter): Convert between px, rem, em, vw and more - [String Inspector](https://kit.logscrap.com/tools/string-inspector): Analyze string encoding, bytes, and characters ## API Each tool is accessible as a JSON API: GET https://kit.logscrap.com/api/tools/{slug}?input={value} ## Source https://kit.logscrap.com