22 tools in this category
Format, validate, and beautify JSON data instantly. Minify JSON, fix formatting errors, and validate JSON syntax online. Perfect for developers working with APIs and configuration files.
Compare two texts side-by-side with color-coded highlighting for additions, deletions, and modifications. Supports line-by-line, word-level, and character-level comparison modes. Perfect for code review, document comparison, and tracking changes.
Convert images to Base64 encoded strings instantly for easy embedding in HTML, CSS, JSON, or any text-based format. Supports all common image formats including PNG, JPG, GIF, WebP, and SVG. Features multiple output formats (Data URI, Plain Base64, HTML img tag, CSS background-image, JSON), drag-and-drop upload, real-time preview with file information, one-click copy to clipboard, and download as text file. Perfect for web developers embedding images inline, API responses with image data, email templates, offline web apps, and reducing HTTP requests. Shows original and Base64 file sizes with increase percentage. 100% client-side processing ensures complete privacy - images never leave your device.
Decode Base64 encoded strings back to image files instantly. Perfect for developers working with Base64 image data in web applications, APIs, or databases. Supports all common image formats including PNG, JPG, GIF, WebP, and BMP. Features include pasting Base64 strings (with or without data URI prefix), automatic format detection, live image preview with dimensions and file size, one-click download of decoded images, and format information display. Handles both raw Base64 strings and complete data URI format (data:image/png;base64,...). Useful for debugging API responses with Base64 images, converting database-stored Base64 images, testing Base64 image data, extracting images from JSON/API responses, and validating Base64 encoded images. 100% client-side processing ensures complete privacy - all decoding happens in your browser, data never leaves your device. No file size limits.
Convert Unix epoch timestamps to human-readable dates and back. Live current-timestamp ticker, auto-detects seconds vs milliseconds, outputs ISO 8601, UTC, local time, and relative ("2 hours ago") formats. Perfect for debugging logs, APIs, and databases.
Convert colors between HEX, RGB, and HSL instantly, and generate shade, complementary, analogous, and triadic palettes from any base color. All processing happens in your browser.
Generate strong, random passwords instantly. Adjustable length and character sets (uppercase, lowercase, numbers, symbols), live strength indicator, one-click copy. All generation happens in your browser using the Web Crypto API — passwords are never sent anywhere.
Encode or decode URLs and URL components instantly. Supports both component encoding (encodeURIComponent, for query params) and full-URL encoding (encodeURI, preserves URL structure). Perfect for debugging query strings, API requests, and web forms.
Generate random UUID v4 identifiers instantly, one or in bulk (up to 100 at once). Copy individually or all at once. Perfect for database keys, API testing, and unique identifiers in code. 100% client-side using crypto.randomUUID().
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files instantly. Perfect for verifying file integrity, checksums, and debugging. All hashing happens in your browser using the Web Crypto API — nothing is uploaded.
Comprehensive token tool to decode, verify, and generate JWT (JSON Web Tokens) and PASETO (Platform-Agnostic SEcurity TOkens) instantly. View header, payload, and signature sections with syntax-highlighted JSON. Generate new tokens with custom payloads. Perfect for developers debugging authentication tokens, API tokens, and bearer tokens. Features instant real-time decoding as you type, support for both JWT and PASETO token formats, token generation with custom algorithms (HS256, HS384, HS512), three-part visualization showing header/version, payload, and signature/footer separately, color-coded JSON syntax highlighting for easy reading, one-click copy to clipboard for each section, and complete client-side processing for maximum security. All token processing happens entirely in your browser - tokens are never transmitted to any server, ensuring complete privacy and security. Supports all standard JWT formats and PASETO v2/v4. Ideal for debugging authentication flows, inspecting API tokens, generating test tokens, understanding token structure, validating token claims, and learning about modern authentication. No installation or registration required.
Test regular expressions against sample text with live match highlighting, capture groups, and flag support (g/i/m/s). All processing happens in your browser.
Convert YAML to JSON or JSON to YAML instantly, in either direction, with clear parse-error messages. All conversion happens in your browser.
Interactive sorting algorithm visualizer to watch and learn how different sorting algorithms work in real-time. Visualize Bubble Sort, Selection Sort, Insertion Sort, Merge Sort, Quick Sort, and Heap Sort with step-by-step animations. Perfect for computer science students, developers preparing for interviews, and anyone learning data structures and algorithms. Features 6 different sorting algorithms with live visualizations, adjustable speed control from very slow to very fast, variable array size from 10 to 150 elements, real-time statistics showing comparisons and swaps, color-coded visualization with different colors for comparing (yellow), swapping (red), pivot (orange), and sorted (green) elements, live timer tracking execution time, responsive design that works on desktop, tablet, and mobile, dark and light theme support, and educational complexity information for each algorithm showing best, average, worst, and space complexity. Watch every comparison and swap as it happens with smooth animations. Generate new random arrays instantly. Stop and restart sorting at any time. Learn algorithm efficiency by comparing different sorting methods on the same data. Understand time complexity differences between O(n²) and O(n log n) algorithms visually. See how divide-and-conquer algorithms like Merge Sort and Quick Sort partition and solve sub-problems. Observe the heap building process in Heap Sort. All processing happens entirely in your browser with no data sent to servers. Perfect for visual learners, interview preparation, classroom teaching, algorithm comparison, and self-paced education.
Convert numbers between binary, octal, decimal, and hexadecimal instantly. Type in any field and the others update live. Uses arbitrary-precision math, so very large numbers stay accurate. All processing happens in your browser.
Generate placeholder Lorem Ipsum text by paragraphs, sentences, or words. Copy or download instantly. All generation happens in your browser.
See your browser name and version, rendering engine, operating system, and full user-agent string, along with language, viewport, and cookie settings. Free, works entirely in your browser.
Convert SVG markup or files to PNG images at any scale, from 1x up to 8x for crisp high-resolution output. All rendering happens in your browser using canvas — nothing is uploaded.
Paste a curl command and get a working ApiClient class in JavaScript (fetch or axios), Python (requests or the stdlib http.client), PHP (cURL or Guzzle), Go, Java, or C# — headers, body, and Basic auth all mapped correctly. Free, works entirely in your browser.
Build, test, and understand cron expressions — a plain-English description, the next 10 run times, and one-click presets. Supports both standard 5-field cron and 6-field Quartz syntax (with seconds). Free, works entirely in your browser.
Paste raw Protocol Buffers (protobuf) bytes as base64 or hex and see every field decoded — no .proto schema needed. Shows every plausible interpretation of each field, since the wire format alone can't say which one is correct.
Paste JSON and generate class or struct definitions in TypeScript, Java, Go, Python, C#, Kotlin, or C++ — with explicit control over field and class naming convention, and real nested-class generation. Free, works entirely in your browser.