Use this category hub to explore developer tools, SEO utilities, image workflows, accessibility audits, calculators, finance tools, and more through clean crawlable pages built for both users and search engines.
Hash, encrypt, compare, and decode sensitive values entirely in your browser.
Password Generator
Generate secure passwords with customizable length, numbers, and symbols.
QR Code Generator
Create QR codes for URLs, text, WiFi, and email with download options.
Base64 Encode/Decode
Encode and decode text to and from Base64 format instantly.
MD5 Hash Generator
Generate MD5-style hash values from any text input.
Format code, convert data structures, and clean up messy developer input.
Transform, analyze, compare, and generate text for writing and research workflows.
Crop, rotate, watermark, inspect, and export images without uploads.
Build gradients, filters, shadows, motion, and CSS snippets with live previews.
CSS Gradient Generator
Create linear and radial gradients with multiple stops.
Box Shadow Generator
Create CSS box shadows with a visual editor.
Border Radius Generator
Generate CSS border-radius values for custom shapes.
CSS Filter Generator
Adjust blur, brightness, contrast, hue, and more with live CSS output.
Generate tags, inspect page data, and analyze content for search visibility.
Everyday calculators for finance, health, dates, units, and quick conversions.
Generate names, quotes, colors, passwords, numbers, and playful creative data.
Random Number Generator
Generate integers or decimals within a custom range.
Random Color Generator
Generate random HEX and RGB colors with instant swatches.
Random Name Generator
Generate first and last name combinations for mock data.
Random Address Generator
Create plausible sample street addresses for demos and testing.
Record, visualize, and synthesize sound with lightweight browser-native tools.
Audio Waveform Visualizer
Load an audio file and inspect its waveform in the browser.
Audio Recorder
Record microphone input and download the captured audio.
Metronome
Practice with a browser-based metronome and adjustable tempo.
White Noise Generator
Generate looping white, pink-style, or brown-ish noise textures locally.
Inspect, split, merge, archive, and checksum files locally.
ZIP File Compressor
Bundle multiple files into a downloadable ZIP archive locally.
File Merger
Merge multiple text files into one combined output with separators.
File Splitter
Split text files by line count or approximate chunk size.
MIME Type Detector
Inspect uploaded files for MIME type, extension, and signature hints.
Audit navigation, labels, and UX details that improve keyboard and screen-reader support.
Color Contrast Checker
Check foreground and background color contrast against common WCAG thresholds.
Heading Structure Outline
Audit pasted HTML for heading order, skipped levels, and document outline clarity.
ARIA Label Reviewer
Review interactive elements for missing accessible names and weak ARIA labeling.
Focusable Elements Checker
List focusable controls, tabindex order, and skip-link coverage from pasted markup.
Inspect structured exports, logs, charts, and browser diagnostics without uploading files.
Generate Chart
Turn pasted CSV, JSON, or plain text into configurable charts and downloadable reports.
WiFi Speed Test
Measure same-origin download speed, upload speed, latency, and connection quality with browser-safe benchmarks.
Ping Test Tool
Test round-trip request latency to a public URL with browser-safe fetch timing and packet-loss estimates.
CSV Column Profiler
Profile CSV headers, fill rates, and likely column types from pasted data.
Model pricing, margin, billing, and break-even decisions with privacy-first calculators.
Profit Margin Calculator
Calculate profit, markup, and margin from revenue and cost inputs instantly.
Sales Tax Calculator
Calculate tax-inclusive totals and tax amounts from any subtotal and rate.
Pricing Markup Calculator
Turn unit cost and target markup into a selling price and gross margin estimate.
Subscription Revenue Forecast
Project customer growth, churn, MRR, and ARR from recurring revenue assumptions.
Solve practical electrical and technical calculations with visual references and unit-aware math.
Voltage Divider Calculator
Calculate divided output voltage and resistor ratios for simple analog circuits.
LED Series Resistor Calculator
Calculate a safe resistor value and power rating for single-LED circuits.
Power Supply Runtime Calculator
Estimate battery runtime from capacity and expected load current.
Capacitor Charge Discharge Calculator
Estimate RC time constants and common charge thresholds for timing circuits.
Visualize concepts, build study plans, and turn abstract topics into interactive practice.
Fraction Simplifier Calculator
Reduce fractions to lowest terms and convert them to decimals and percentages.
Scientific Notation Converter
Convert numbers between expanded form and scientific notation instantly.
Study Session Planner
Build focused study blocks with short breaks and long-break intervals.
Flashcard Randomizer
Shuffle flashcard prompts from a custom list for quick exam practice.
Compare optics, sky-view calculations, and observational planning data in the browser.
Moon Phase Finder
Estimate the moon phase and illumination for any calendar date.
Escape Velocity Calculator
Calculate escape velocity from planetary mass and radius estimates.
Planet Weight Calculator
Compare your Earth weight against gravity on planets and the moon.
Telescope Magnification Comparator
Compare eyepiece magnification and field-of-view tradeoffs for one telescope setup.