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Format, validate, and beautify JSON instantly — with clear error messages, Tree View, Diff mode, and Schema validation.

Encode text to Base64 or decode Base64 to text.

Encode and decode URL strings with special characters.

Convert between Unix timestamps and human-readable dates across any timezone — with millisecond precision and real-time epoch display.

Convert Markdown to clean, semantic HTML with live preview — supports GFM tables, task lists, syntax highlighting, and custom sanitization.

Convert HTML into clean, readable Markdown — preserving headings, links, images, lists, and tables.

Generate random UUID v4 identifiers instantly — single or bulk, with format options.

Generate cryptographically secure random passwords using crypto.getRandomValues() — customizable length, character sets, and entropy calculation.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.

Generate QR codes from text, URLs, or any data.

Generate realistic placeholder data (users, addresses, UUIDs) in JSON or CSV for testing APIs and databases.

Generate structured mock JSON API responses from a schema — for frontend testing and component prototyping.

Convert text between uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE instantly.

Generate placeholder text for your designs and mockups — by paragraph, sentence, or word count, with classic or random variation.

Count words, characters, sentences, paragraphs, and reading time — with keyword density analysis and platform-specific character limit indicators.

Compare two text blocks and see additions, deletions, and changes highlighted line-by-line using the Myers diff algorithm — like Git diff in a browser.

Test and debug regular expressions with live match highlighting, capture group display, and flag explanations — using JavaScript's native RegExp engine.

Convert special characters to HTML entities (& → &) and decode them back — for safe, valid HTML.

Crop, rotate, and resize images with preset aspect ratios — all locally in your browser with no quality loss.

Generate placeholder images with exact dimensions, colors, and text — download as PNG or copy the URL for development.

Create favicons from text, emoji, or images — generates ICO, PNG, and all required Apple Touch icon sizes.

Convert PNG, JPG, WebP, and SVG images to Base64 strings for direct embedding in HTML, CSS, or JSON payloads.

Convert images between PNG, JPG, WebP, and AVIF formats — with quality controls and batch conversion.

Reduce image file size online — compress JPEG, PNG, and WebP without losing visible quality.

Convert between PX, REM, EM, VW, VH, and % CSS units — with configurable base font size and live conversion.

Create CSS box shadows with a visual editor.

Create beautiful CSS gradients with a visual editor.

Create complex CSS border-radius shapes with independent corner controls — from rounded buttons to organic blobs.

Build CSS Flexbox layouts visually — configure every container and item property and get ready-to-use CSS.

Build CSS Grid layouts visually — configure columns, rows, gaps, and named areas and copy production-ready CSS.

Convert colors between HEX, RGB, HSL, HSV, CMYK, and HWB. Includes tints & shades, WCAG contrast ratio, CSS snippets, and color history.

Generate harmonious color palettes and schemes.

Check WCAG color contrast ratios for accessibility.

Extract exact Hex, RGB, and HSL color codes from any image using a precision eyedropper tool.

Decode and inspect JSON Web Tokens (JWT) without validation.

Build and decode cron schedule expressions visually — get human-readable descriptions and next run times.

Searchable reference for all HTTP status codes — with meaning, common causes, and fix recommendations.

Decode any User-Agent string — identify browser, engine, OS, device type, and bot classification.

Format and beautify SQL queries.

Convert Unix epoch timestamps to human-readable dates and vice versa — with timezone support.

Validate XML sitemaps for syntax errors, structure issues, and SEO best-practice compliance.

Convert any text to a clean, SEO-friendly URL slug — handles special characters, accents, and spaces.

Generate SEO title tags, meta descriptions, Open Graph, and Twitter Card tags for any webpage.

Generate Open Graph and Twitter Card meta tags for rich social media link previews.

Build a valid robots.txt file with visual rules, user-agent controls, and sitemap declaration.

Download thumbnails from any YouTube video in high quality.

Create realistic fake tweet mockups with custom profile, blue checkmark, metrics and dark/light mode.

Estimate your X (Twitter) creator ad revenue — understand the CPM model, payout thresholds, and revenue-per-impression math.

Download the highest-resolution thumbnail from any public Vimeo video using the Vimeo oEmbed API.

Convert tweet text to a beautifully designed image card — share quotes, testimonials, and posts on Instagram, LinkedIn, and Pinterest.

Test how secure your password is — get an entropy score, estimated crack time, and actionable tips.

Convert PDF pages to high-quality JPEG or PNG images — choose DPI, page range, and format.

Convert JPEG, PNG, and WebP images into a single PDF document — drag to reorder, choose page size.

Combine multiple PDF files into a single document — drag to reorder, merge instantly in your browser.

Extract specific pages or split a PDF into separate files — by range, every page, or custom groups.

Make digital PDFs look like scanned documents.

Convert any HTML and CSS code into a PDF document instantly in your browser — no upload, no server.