AI Content Detector
Analyze perplexity, burstiness, and syntactic uniformity to estimate whether text reads human-written or AI-generated.
All Free Online Tools
Explore every utility across our ten tool shelves. Bookmark your daily favorites locally—no signup or tracking required.
All Online Tools (35)
AI Readability & Tone Analyzer
Measure Flesch-Kincaid grade level, passive voice density, and sentence complexity locally in real time.
Meta Tag Generator
Generate valid HTML title, meta description, canonical, robots, Open Graph, and X Card tags with live social & OG image previews.
Meta Tag & SERP Previewer
Check any live website URL or custom tags and preview OG images on Facebook, X, LinkedIn, Pinterest, and Google SERPs.
Website SEO Analyzer
Run an instant on-page SEO audit on any public URL: title, description, canonical, H1 count, OG tags, and alt attributes.
Keyword Density Checker
Calculate 1-word, 2-word, and 3-word n-gram keyword frequencies and density percentages across your article.
Robots.txt Generator
Build clean, standards-compliant robots.txt crawl rules for Googlebot, Bingbot, AI crawlers, and XML sitemaps.
XML Sitemap Generator & Helper
Convert a list of URLs into a valid sitemap.xml document with lastmod, changefreq, and priority attributes.
YouTube Tag Generator
Generate relevant, comma-separated YouTube video tags and long-tail variations within the 500-character budget.
YouTube Title Length Checker
Check how your YouTube video title displays across Mobile, Desktop Home, Search, and Suggested feeds without truncation.
YouTube Thumbnail Downloader
Extract and download HD (1280x720), SD (640x480), and HQ (480x360) thumbnails from any public YouTube video URL.
YouTube Earnings Calculator
Estimate daily, monthly, and yearly YouTube AdSense revenue from daily views and niche RPM ranges.
Image to PDF Converter
Combine JPG, PNG, and WebP images into a clean multi-page PDF document 100% locally in your browser.
Merge PDF Files
Combine multiple PDF documents into one ordered PDF file privately inside your browser with pdf-lib.
Split & Extract PDF Pages
Extract specific pages or page ranges (e.g., 1-3, 5, 8-10) from any PDF locally in your browser.
Image Format Converter
Convert images between PNG, JPG, and WebP in your browser with configurable export quality.
Image Compressor
Shrink JPG, PNG, and WebP file sizes locally with live quality control, optional max-width resize, and savings stats.
Background Remover
Remove solid or clean studio backgrounds locally via smart chroma-alpha masking, with optional Remove.bg API integration.
QR Code Generator
Generate crisp, customizable QR codes for URLs, Wi-Fi, text, or vCards and download high-DPI PNG or vector SVG.
Text Case Converter
Transform text instantly between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case.
Base64 Encoder & Decoder
Encode UTF-8 text or uploaded files to Base64 / Base64URL and decode Base64 strings safely in your browser.
Color Picker & Converter (HEX / RGB / HSL)
Pick colors visually and convert instantly between HEX, RGB, RGBA, HSL, and CSS variables with WCAG contrast checker.
JSON Formatter & Validator
Beautify, minify, sort keys, and validate JSON payloads with line/column error diagnostics locally in your browser.
URL Encoder & Decoder
Percent-encode or decode URLs, query parameters, and UTM strings cleanly and inspect parsed query key-value pairs.
Regular Expression (Regex) Tester
Test JavaScript/ECMAScript regular expressions with live match highlighting, capture groups, flags, and cheat-sheet presets.
Website Screenshot Generator
Capture desktop or mobile viewport preview cards of any public URL with optional headless screenshot API support.
HTTP Header Checker
Inspect live HTTP status codes, redirect chains, cache-control policies, compression, and security headers for any URL.
Internet Speed Test
Measure real-time ping latency, jitter, download throughput (Mbps), and upload speed directly from your browser.
Word & Character Counter
Count words, characters (with and without spaces), sentences, paragraphs, and reading/speaking time instantaneously.
Text Diff Checker
Compare two versions of text, code, or JSON line-by-line and word-by-word with color-coded additions and deletions.
Lorem Ipsum Generator
Generate customizable paragraphs, sentences, words, or HTML-wrapped Lorem Ipsum placeholder copy in one click.
Text Size & Byte Calculator
Calculate exact UTF-8 and UTF-16 byte size, KB/MB weight, line count, and gzipped estimate for any string or payload.
Hash Generator (MD5 / SHA-1 / SHA-256 / SHA-512)
Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic digests for text or local files in your browser.
UUID Generator (v4 & v7)
Generate RFC-compliant UUID v4 (random) and UUID v7 (time-ordered) identifiers in bulk with uppercase/hyphen options.
Checksum & Hash Verifier
Verify file integrity or compare two cryptographic hashes cleanly with automatic algorithm length detection.