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free sales tax calculator
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Encode and decode Base64, URL, HTML entities, hashes, and ciphers. Generate UUIDs, JWTs, HMACs, and cryptographic hashes — all computed locally with no server round-trips.
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Format and validate JSON, decode JWTs, diff text, edit HTML, convert CSV↔JSON, test regex, and more. Essential developer utilities that run 100% client-side — no data leaves your machine.
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Resize, compress, crop, rotate, and convert images between formats. Add watermarks, apply filters, generate placeholders, and optimize for web — all processed locally in your browser.
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Convert Word, Excel, and PowerPoint files. DOCX to PDF, XLSX to CSV, PPTX to text, and more. All office document conversions happen locally — your files never leave your device.
Generate iOS, Android, and Play Store app icons, mobile wallpapers, and Open Graph social share images from a single source image. Perfect for developers and marketers.
Trim, fade, normalize, reverse, and pitch-shift audio files entirely in your browser via the Web Audio API. No uploads required — all audio processing is done client-side.
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Convert between thousands of measurement units across length, area, volume, weight, temperature, speed, time, data, force, pressure, energy, power, and angle — all instantly in your browser.
Perform DNS lookups, WHOIS queries, ping tests, HTTP header checks, SSL certificate verification, and IP address lookups. Essential network diagnostic tools — all browser-based and free.
Calculate concrete volume, brick counts, paint coverage, roofing materials, lumber requirements, and flooring dimensions. Essential calculators for builders, contractors, and DIY home renovators.
Apply Ohm's Law, calculate electricity costs, size single and three-phase power systems, estimate battery run time, and convert electrical units. Free tools for electricians, engineers, and students.
Perform statistical analysis, frequency distribution, and create editable data tables directly in your browser. Explore and analyze datasets with powerful yet simple tools — no uploads required.
Download Instagram profile photos, extract social media links, analyze social URLs, and generate carousel previews. Handy social media utilities — all free and running in your browser.
Test REST APIs, explore GraphQL endpoints, debug WebSocket connections, and format API responses. Essential tools for API development and testing — all running client-side.
Format SQL queries, design database schemas, generate ERD diagrams, and convert between SQL dialects. Database development utilities that work entirely in your browser.
Build Docker Compose files, generate Kubernetes YAML, create GitHub Actions workflows, and write Terraform snippets. Infrastructure-as-code tools for modern DevOps workflows.
Check color contrast ratios, simulate color blindness, validate ARIA labels, and audit focus order. Essential WCAG compliance and web accessibility testing tools — all free and browser-based.
Generate Content Security Policies, security.txt files, CSRF tokens, and SRI hashes. Build cookie consent banners and privacy policies. Keep your websites secure and compliant.
Convert Markdown to HTML, PDF, and slides. Format, lint, and preview Markdown content. Generate README files and changelogs — all in your browser with instant preview.
Test, debug, visualize, and generate regular expressions. Build regex patterns visually, explain complex expressions in plain English, and batch-test against sample data — all browser-based.
Fun browser-based mini-games for kids and adults. Play memory match, dino runner, dice roller, counting caterpillar, kids piano, and more — all free, no downloads, no ads in the game area.
Count words and characters, convert case, sort lines, find and replace text, and manipulate strings. All essential text manipulation utilities — free, private, and running in your browser.
Scan QR codes and barcodes in real-time using your device camera. Digitally scan documents with edge detection and perspective correction — all processing done locally in your browser.
Solve mathematical problems, debug spreadsheet formulas, and perform calculations. Free online math utilities that work entirely in your browser — no downloads or sign-ups required.
All tools · Tag
1 tool tagged with "free sales tax calculator" across 1 category.
Most shortcuts ignore when you're typing in a text field.