Hyper-Fast Web Utilities.
Zero Server Uploads.

Beautify, validate, format, and inspect JSON payloads with syntax highlighting and instant error markers.

Encode and decode UTF-8 text or binary files into standard and URL-safe Base64 strings directly in your browser.

Decode JSON Web Tokens (JWT) into human-readable header, payload, and signature components with expiration checkers.

Encode or decode URLs, percent-encoded query strings, and inspect URL parameters with live parameter parsing.

Convert special characters into HTML named entities (&), decimal (&), or hexadecimal (&) format.

Generate cryptographically random UUID v4, v1, and NanoID strings in bulk with customizable casing and formatting.

Convert CSV/TSV to JSON and JSON back to CSV with delimiter detection, header mapping, and interactive table preview.

Test and debug JavaScript regular expressions in real-time with capturing group breakdown and live substitution.

Minify, compress, and strip whitespace from JSON payloads with byte savings calculation and quote escaping.

Instantly convert JSON objects into clean TypeScript interfaces, type aliases, and nested types.

Bidirectional converter between JSON and YAML with custom indentation, syntax error detection, and file download.

Bi-directional converter between JSON objects and well-formed XML documents with custom root nodes and indentation.

Format and beautify complex SQL queries with custom indentation, keyword uppercasing, and syntax cleanup.

Minify CSS stylesheets by stripping comments, redundant spaces, and optimizing color codes with byte savings metrics.

Lightweight JavaScript and TypeScript code minifier removing comments, whitespace, and debug logs.

Parse and validate 5-field cron expressions with human-readable explanations and next 5 run schedules.

Side-by-side interactive Markdown editor with live sanitized HTML preview, word count, and HTML exporter.

Compare two text documents or code snippets side-by-side or inline with added, removed, and modified line highlighting.

Real-time word, character, sentence counter with reading time estimation, Flesch-Kincaid readability, and keyword density.

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, URL slugs, and 10+ formats.

Generate customizable placeholder text by paragraphs, sentences, words, or lists with Latin, Tech, and Slang themes.

Design GitHub Flavored Markdown tables visually with dynamic rows, columns, alignment, and 1-click copy.

Remove duplicate lines from lists and documents with case-sensitivity, trim options, and alphabetical sorting.

Strip empty lines and whitespace from text or collapse consecutive blank lines into single breaks.

Sort text lines alphabetically (A-Z, Z-A), numerically, or by length (shortest/longest) with case control.

Add customizable sequential line numbers, zero-padding, prefixes, and suffixes to multi-line text.

Reverse text characters, words, lines, or generate upside-down flipped Unicode text instantly.

Convert text to Morse code and Morse to plain text with Web Audio tone playback and visual flashing lamp.

Spell out words, call signs, and alphanumeric codes in the international ICAO / NATO phonetic alphabet with speech audio.

Calculate WCAG 2.1 AA/AAA contrast ratios between foreground and background colors with live preview and color conversion.

Generate customized QR codes for URLs, Wi-Fi credentials, plain text, and emails with PNG and vector SVG export.

Compress and convert JPEG, PNG, WebP, and AVIF images with real-time quality slider, dimension scaling, and byte savings delta.

Rasterize scalable SVG code to ultra-high-resolution PNG (up to 8x) and vectorize PNG/JPG images into scalable SVG vectors.

Sample exact pixel colors from any uploaded image with zoom magnifying loupe and HEX/RGB/HSL export.

Extract dominant color palettes from images using color quantization and export as CSS variables or JSON.

Create photographic negatives and invert image colors with real-time intensity slider and high-resolution export.

Transform photos into high-contrast black & white or grayscale using Rec.709, Rec.601, and threshold algorithms.

Apply warm antique sepia tones, authentic film grain noise, and dramatic vignetting to any photograph.

Add smooth rounded corners, circular avatar masks, borders, and shadows with transparent PNG export.

Generate standard Code-128 retail and inventory barcodes with custom scale, height, text labels, and vector SVG export.

Design linear, radial, and conic CSS gradients with multi-color stops, presets, visual angle wheel, and instant CSS copy.

Generate pure sine, square, sawtooth, and triangle sound waves from 20 Hz to 20,000 Hz with real-time oscilloscope.

Generate continuous white, pink, and brown noise with live spectrum visualizer for deep focus, sleep, and tinnitus masking.

Generate pure stereo binaural beats for Delta, Theta, Alpha, Beta, and Gamma brainwave states with real-time waveform display.

High-precision drift-free audio metronome (30 to 300 BPM) with tap tempo, accented beats, and time signatures.

High-precision chromatic instrument tuner with live microphone pitch detection, cents deviation meter, and reference tones.

Real-time FFT audio spectrum waterfall visualizer analyzing microphone frequencies with color heatmaps.

Real-time acoustic loudness measurement using microphone Web Audio RMS with peak tracking and OSHA safety alerts.

Verify headphone and speaker left/right channels, soundstage balance, and auto-sweep panning with test tones.

Compute cryptographic hashes (SHA-256, SHA-512, SHA-384, SHA-1, MD5) with hardware acceleration via Web Crypto API.

Generate cryptographically secure random passwords, memorable passphrases, and PINs with live entropy scoring.

Generate secure 12 and 24-word cryptocurrency recovery seed phrases in-memory with Web Crypto CSPRNG.

Calculate keyed-hash message authentication codes (HMAC-SHA256, SHA512, SHA384, SHA1) with Web Crypto API.

Compute cryptographic Keccak-256 hashes used in Ethereum smart contracts from UTF-8 strings or raw hex.

Generate secure salted Bcrypt password hashes with customizable cost factors and validate hash formats.

Military-grade authenticated encryption using browser Web Crypto API with PBKDF2 key derivation and Base64 output.

Generate cryptographically secure public & private PEM key pairs in memory with one-click download.

Analyze cryptographic Shannon entropy, charset pool diversity, and brute-force crack time resistance.

Calculate netmask, broadcast, usable host ranges, wildcard mask, and network classification.

Convert length, weight, digital storage, and temperature units with instant bidirectional calculations.

Trigonometric, logarithmic, exponential, and algebraic calculations with Degree / Radian switching.

Compute percentage values, relative ratios, and percentage increase / decrease deltas.

Convert numbers between Binary, Octal, Decimal, Hexadecimal, and arbitrary radixes from 2 to 36.

Convert between standard Arabic integers and classical Roman numerals with strict grammar validation.

Decompose integers into prime factor powers and inspect full divisor sets and primality status.

Calculate Greatest Common Divisor (GCD) and Least Common Multiple (LCM) for lists of numbers.

Convert proper and improper fractions to decimal values, percentages, and mixed numbers with GCD reduction.

Calculate Mean, Median, Mode, Sample/Population Standard Deviation, Variance, and Range from datasets.

Convert Unix epoch timestamps to human-readable UTC/local dates, relative time, and convert dates back to seconds/ms.

Convert and format timestamps into ISO 8601, RFC 3339, RFC 2822, and standard formats.

Calculate exact days, weeks, months, and hours between two calendar dates.

Add or subtract days, weeks, months, and years from any baseline date.

Convert times across major global financial hubs and international timezones simultaneously.

Calculate working days, weekends, and standard 8-hour billable work hours between dates.

Track real-time days, hours, minutes, and seconds remaining until any holiday, deadline, or event.

Find the exact day of the week for any historical or future date and check leap years.

Calculate exact age in years, months, and days, plus countdown to next birthday.

Inspect LCD, OLED, and IPS monitors for dead, stuck, and hot pixels in full-screen with rapid strobe pixel recovery.

Benchmark display monitor refresh rate (60Hz, 120Hz, 144Hz, 240Hz) and frame rendering stability.

Press multiple keys simultaneously to test matrix anti-ghosting and rollover capacity.

Measure your gaming click speed in Clicks Per Second (CPS) with 5s / 10s benchmark timers.

Inspect display resolution, CSS viewport, physical pixels, Retina scaling, and color depth.

Connect any Xbox, PlayStation, or generic USB/Bluetooth controller to test buttons and analog joysticks.

Test your webcam video feed, capture snapshots, and verify resolution & frame rate securely in your browser.

Calculate resistance and tolerance values from 4-band and 5-band color rings with interactive visual feedback.

Calculate Body Mass Index (BMI), WHO weight categories, healthy weight targets, and daily maintenance calories (TDEE).

Calculate the calories your body burns at rest using the scientifically validated Mifflin-St Jeor and Harris-Benedict formulas.

Calculate your total daily energy expenditure based on activity level, along with calorie and macro targets for fat loss or muscle gain.

Estimate body fat percentage using circumferences with the validated U.S. Navy tape measure algorithm.

Calculate cardiovascular training zones (Zone 1 to Zone 5) using the Karvonen Heart Rate Reserve formula for aerobic efficiency and endurance.

Calculate your optimal personalized daily hydration target in liters and glasses based on weight, activity, and climate.

Estimate your maximum single-repetition lift strength using validated sports science formulas (Brzycki, Epley, Lombardi).

Calculate natural 90-minute sleep cycles to wake up feeling refreshed and avoid sleep inertia grogginess.

Boost productivity with interval focus sessions, animated progress rings, audio chimes, and celebration streaks.

Simulate compound interest and exponential wealth accumulation with recurring deposits and customizable interest rates.

Calculate monthly mortgage payments, total interest costs, and amortization summaries with customized terms and rates.

Convert annual salary to hourly wage (and vice-versa) factoring in work hours, overtime, and paid time off.

Calculate sales tax, VAT, or reverse-calculate pre-tax amounts from total purchase prices.

Calculate gratuity tips and split bills evenly among multiple people with customizable tip percentages.

Calculate final discount sale prices, stacked coupons, and total money saved on shopping deals.