Free Online Tools
Practical browser-side utilities (processed locally with zero data sent to servers) and rate-limited server web diagnostics.
Browser-Side Utilities (12)
Processed locally in your browser via Web Crypto, UTF-8 encoders, and HTML5 Canvas.
Secure Password Generator
Generate cryptographically random passwords locally in your browser using the Web Crypto API.
Password Strength Estimator
Estimate password entropy and pattern weaknesses locally without transmitting your password.
Word & Character Counter
Count words, characters (with and without spaces), sentences, paragraphs, lines, and estimated reading time.
JSON Validator & Formatter
Validate JSON syntax, pretty-print with 2 or 4 spaces, or minify JSON payloads cleanly.
URL Encoder & Decoder
Percent-encode query strings and decode URL-encoded components safely.
Base64 Encoder & Decoder (Unicode)
Encode and decode UTF-8 Unicode text to Base64 without character corruption.
SHA-256 Hash Generator
Compute cryptographic SHA-256 digests of text using Web Crypto SubtleCrypto.
UTM Campaign URL Builder
Construct clean, properly encoded Google Analytics / attribution UTM tracking URLs.
Meta Title & Description Preview
Preview how your page title, URL, and meta description appear in search snippets with length guidance.
Robots.txt Generator
Build a standards-compliant robots.txt file with crawler rules, allow/disallow paths, and sitemap URL.
XML Sitemap Generator
Generate a valid XML sitemap from a list of canonical HTTP/HTTPS URLs.
Browser Image Resizer & Converter
Resize, compress, and convert PNG, JPEG, and WebP images locally using HTML5 Canvas without uploading files.
Server-Side Web Diagnostics (6)
Protected by HTTP/HTTPS validation, private-network SSRF blocking, timeouts, and rate limits.
DNS Record Lookup
Query A, AAAA, MX, TXT, NS, CNAME, and SOA DNS records for any valid public domain.
HTTP Status & Redirect Checker
Trace HTTP status codes and redirect chains (up to 5 hops) with strict SSRF and private-network protections.
HTTP Security Headers Checker
Inspect key HTTP security response headers (HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy) with explanations and scope limits.
Website Metadata & Open Graph Checker
Fetch and inspect a webpage title, meta description, canonical link, robots tag, and Open Graph / Twitter Card tags.
Email Syntax & Domain MX Checker
Validate email address syntax and inspect domain MX / SPF TXT records. Explicitly does not verify mailbox existence or deliverability.
PageSpeed Insights Analyzer
Run real Google PageSpeed Insights analysis separating Lighthouse lab metrics from CrUX field data when available.
Extension-Ready Integrations (Requires Configuration)
These specialized integrations require external service credentials and remain disabled until configured by an administrator.
AI Background Remover
Remove image backgrounds using a dedicated segmentation provider integration.
Full Email Deliverability & Inbox Placement Test
Run seed-inbox SMTP/DKIM/DMARC deliverability tests across external mail providers.
EU VAT Number Validator
Verify European VAT registration numbers against an official VIES gateway.
Live SERP Position Analyzer
Inspect search engine result pages via a licensed SERP API provider.
WCAG Accessibility Auditor
Automated headless browser WCAG contrast and ARIA audit via external runner service.
Instant WebRTC Meeting Room
Peer-to-peer or SFU video meeting rooms via a configured TURN/SFU service.