Queendom Tools

Free, single-purpose online tools that run in your browser. No sign-up, nothing to install.

• App Store Metadata Counter

  Check iOS and Google Play titles and descriptions against the 30/4000 character limits with live counters and instant feedback.

• Base64 Encoder/Decoder

  Encode or decode Base64 quickly and safely. Fully client-side, supports UTF-8, and follows RFC 4648 for 33% output expansion.

• Bulk Text Cleaner & Formatter

  Instantly clean text: strip HTML, collapse spaces, remove blank lines, trim line ends, remove line breaks. Five one-click options, private processing in your browser.

• Business Profit Margin Calculator

  Instantly compute gross margin, net margin, and break‑even point for your ecommerce or startup. Enter price, variable cost, fixed cost, and units to see how many sales you need to

• Compound Interest Calculator with Monthly Contributions

  Accurately project investment growth using a compound interest calculator with monthly contributions. View CAGR and the Rule of 72 instantly.

• CSS Box Shadow Generator

  Create perfect CSS box-shadow values with live sliders, preview, and the full 6-value syntax for UI/UX designers.

• Debt Payoff Calculator

  Calculate your exact debt payoff date, total interest, and check your Debt-to-Income ratio against the 36% lender threshold. Free amortization model.

• Ecommerce Title Length Checker

  Check how many characters remain or are exceeded for Amazon (200), eBay (80), and Etsy (140) titles. Quickly adjust to meet platform limits.

• Email Subject Line Checker & Preview Cutoff Tool

  Analyze your email subject lines against strict mobile (~40) and desktop (~60) preview limits. See exactly where major clients cut off text.

• Free URL Encoder & Decoder

  Quickly encode or decode URLs safely with strict RFC 3986 compliance. Auto-handles spaces, unicode, and query params without breaking routes.

• Freelance Rate Calculator

  Calculate your true minimum freelance hourly rate in seconds. Includes a built-in 15.3% self-employment tax buffer and expense divisor. No sign-up needed.

• Glassmorphism CSS Generator

  Generate responsive glassmorphism CSS with Safari support; copy code instantly.

• Google Ads RSA Counter

  Instantly count characters for Google Ads headlines (30) & descriptions (90). Spot limits, avoid disapproval.

• JSON Formatter Online

  Paste raw JSON to instantly validate against RFC 8259, pinpoint syntax errors, and pretty-print or minify payloads completely client-side.

• JSON to CSV Converter

  Easily convert nested JSON into a flat, RFC 4180-compliant CSV. Download the file with a single click—ideal for data analysts and SEO engineers.

• JWT Decoder

  Paste a JWT to instantly decode header & payload into JSON. Runs locally, zero transmission, signature validation intentionally skipped for security.

• LinkedIn Character Counter & Optimizer

  Instantly optimize your LinkedIn profile and posts with live character counts for headlines (220), posts (3000), and summaries (2600).

• Lorem Ipsum & SVG Placeholder Generator

  Generate up to 50 paragraphs of Lorem Ipsum and inline SVG image placeholders quickly—no external services, perfect for web designers and frontend engineers.

• Marketing ROI Calculator

  Calculate marketing ROI instantly. Get live ROAS, CPA, CPL, and conversion rates from ad spend and revenue inputs. Flags campaigns missing the 4:1 ROAS benchmark.

• Regex Find & Replace Tool

  Run full ECMAScript regex or literal find-and-replace with global flags and capture group support. Fast, client-side, zero setup.

• Regex Tester Online: Live Matches & Group Highlights

  Test regex online with live highlights, group breakdown, and code exports. Supports ECMAScript named groups, lookbehind, and all standard flags.

• Remove duplicates from a list and sort it

  Clean up your text lists quickly: dedupe case-insensitively, keep first occurrence, sort A-Z, Z-A or by length – ideal for marketers & analysts.

• Rental Property ROI Calculator

  Screen rental deals in seconds. Instantly calculates Cap Rate, Cash-on-Cash return, and validates the 1% rule with zero guesswork.

• Retirement Withdrawal Calculator

  Estimate your retirement savings at age 67 and compute the safe 4% annual withdrawal. Fast, accurate calculator for planners and investors.

• SEO URL Slug Generator

  Generate perfectly formatted, SEO-friendly URL slugs instantly. Automatically strips accents, removes stop words, and enforces hyphens for better search ranking.

• SHA-256 Hash Generator

  Generate SHA-256, SHA-1, SHA-384, and SHA-512 hashes instantly in your browser—no data leaves your machine.

• Threads Character Counter

  Instantly check your Threads post length against the 500‑character limit. Live counter, progress bar, and remaining count – perfect for social media managers.

• TikTok Character Counter

  Live TikTok character counter to keep your captions under 2,200 chars and bios under 80. Perfect for creators and agencies.

• Twitter Character Counter

  Instant character count for tweets. 280‑char free limit and 10,000‑char Premium cap, perfect for managers and creators.

• YouTube Character Counter

  Check YouTube title, description, and tags length instantly. Stay within the 100/5000/500 character limits before uploading your video.