Free Developer & Text Tools
Everyday utilities for developers and writers: pretty-print or minify code, validate JSON, convert between JSON and CSV, encode and decode strings, generate secure passwords and UUIDs, and compare two versions of a text.
All processing happens locally in your browser, so you can safely paste configuration files, API responses or other data without it leaving your machine.
Developer & Text tools
JSON Formatter
Free JSON formatter and beautifier. Pretty-print JSON with 1, 2, or 4-space indents, catch syntax errors, or minify it, all instantly in your browser.
JSON Validator
Validate JSON online for free. Paste your data to find syntax errors with line numbers, plus counts of keys, objects, arrays, and nesting depth.
JSON Minifier
Free JSON minifier that strips whitespace and line breaks, validates your data first, and shows the bytes and percentage saved. Runs in your browser.
JSON to CSV Converter
Convert JSON to CSV online for free. Turn JSON arrays into spreadsheet-ready CSV with comma, semicolon, tab, or pipe delimiters and optional headers.
CSV to JSON Converter
Free CSV to JSON converter. Paste CSV with comma, semicolon, tab, or pipe delimiters and get a clean JSON array using your header row as keys. No signup.
Word Counter
Free word counter that tracks words, characters with and without spaces, sentences, paragraphs, reading time, and top words as you type, privately.
Text Case Converter
Free text case converter: switch text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, or kebab-case in one click.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text by paragraphs, sentences, or words. Choose the amount, start with the classic opening, and copy it for mockups.
Text Diff Checker
Compare two texts online and see every change highlighted line by line: green for additions, red for deletions. Ignore case or whitespace. Free.
Base64 Encoder/Decoder
Free Base64 encoder and decoder. Convert text to Base64 or decode Base64 strings back to readable text, with full UTF-8 and Unicode support. Instant.
URL Encoder/Decoder
Encode or decode URLs online for free. Percent-encode query parameters or full URLs, or turn %XX sequences back into readable text, right in your browser.
HTML Encoder/Decoder
Free HTML encoder and decoder. Convert <, >, & and quotes to HTML entities to display code safely, or decode entities back into plain characters.
UUID Generator
Free UUID generator for random version 4 UUIDs. Create one or many at once, switch to uppercase or remove dashes, and copy them instantly. No signup.
Hash Generator
Free online hash generator. Create MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text at once, with an uppercase option. Runs in your browser.
Password Generator
Free secure password generator to create strong random passwords with uppercase, lowercase, numbers, and symbols.
Regex Tester
Test regular expressions online with live match highlighting, capture groups, and g/i/m/s flags. Includes ready-made email, URL, phone, and IP patterns.
Color Converter
Free color converter for HEX, RGB, HSL, and CMYK. Enter any color value to get every format instantly, with a color picker and copy-ready codes.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and back. Shows the current epoch time, local and ISO 8601 formats, and relative time. Detects seconds or ms.
HTML Formatter
Free HTML formatter and beautifier. Indent messy markup with spaces or tabs for readable code, or minify HTML to shrink it for production. No signup.
CSS Formatter
Format and beautify CSS online for free. Clean up indentation, sort properties A to Z, or minify stylesheets and compare original versus minified size.
JavaScript Formatter
Free JavaScript formatter to beautify minified or messy JS. Choose 2 or 4-space indents, single quotes, and semicolons, or minify code for production.
SQL Formatter
Free SQL formatter that puts each clause on its own line, indents conditions, and uppercases keywords for readable queries. Minify SQL too. In-browser.
Markdown Preview
Free online Markdown editor with live preview. Type Markdown and instantly see headings, lists, links, code blocks, and quotes rendered side by side.
IP Subnet Calculator
Free IPv4 subnet calculator. Enter an IP and CIDR prefix to get the network and broadcast addresses, subnet and wildcard masks, and usable host range.
Bandwidth Calculator
Free bandwidth calculator to estimate how long a file takes to download or upload at your connection speed in Kbps, Mbps, or Gbps, plus unit conversions.