There are {count} questions. 15-second countdown per question to answer as fast as possible.

Calculate your exact Last Working Day (LWD), deduct remaining annual leave, exclude weekends, and compute buyout shortfalls.

High-intensity interval training timer with customizable Work & Rest rounds.

Perfect for basketball, football, badminton, table tennis, and board games.

Organize personal sprints and daily tasks with customizable Kanban columns (To Do, In Progress, Review, Done), checklists, priority tags, and JSON backup export.

Classify tasks by urgency and importance across 4 quadrants: Do First, Schedule, Delegate, and Eliminate. Boost executive focus with private local storage.

Combine 25-minute Pomodoro focus cycles with Eisenhower priority task tagging. Features built-in Web Audio ambient sounds (white noise, rain, alpha waves) and chime notifications.

Track weekly employee work hours with automatic unpaid meal deductions, daily and weekly overtime (1.5x/2.0x) rules, total gross pay calculations, CSV export, and print timesheets.

Add the PDF files you want to combine, reorder them using the arrow buttons, and click \

Split a PDF document by page ranges, extract single pages, or separate every N pages.

ลดขนาดไฟล์เอกสาร PDF ของคุณโดยยังคงคุณภาพการแสดงผลที่ดีที่สุด ทำงาน 100% บนเบราว์เซอร์ของคุณ

Strip hidden author info, creation software, GPS tags, and modification timestamps for complete privacy.

Click on individual pages or enter ranges to extract them into a brand-new PDF document.

Click on unwanted pages to mark them for deletion and download the cleaned PDF file.

Arrange PDF pages into your custom sequence using arrow buttons or reverse/shuffle controls.

Rotate individual pages or all pages 90°, 180°, or 270° clockwise or counter-clockwise.

Pick colors, convert HEX/RGB/HSL, and generate harmonious color schemes.

Compress photos and graphics directly in browser with quality and size slider.

Crop photos with standard aspect ratios (1:1, 16:9, 9:16, 4:3), rotate 90°, flip horizontally/vertically, and export lossless PNG, JPEG, or WebP directly in your browser.

Inspect hidden camera settings (shutter speed, ISO, aperture, focal length) and embedded GPS coordinates in photos. Strip EXIF metadata with 1 click to protect privacy.

Scan QR codes and barcodes directly from your device webcam, image upload, or clipboard screenshot paste. Instant WiFi, URL, and text decoding. 100% private.

Generate all standard favicon sizes (16x16, 32x32, 180x180 Apple Touch, 192/512 PWA icons) from any logo, preview browser tabs, and download a ready-to-use ZIP.

Batch convert PNG, JPG, WebP, GIF, and BMP images locally in your browser. Adjust lossy quality compression, resize dimensions, and download single files or ZIP archives.

Rasterize vector SVG files or code into crisp, high-resolution PNG, JPG, or WebP images up to 16x scale (4K/8K) with transparent alpha backgrounds.

Record your full screen, application window, or browser tab with system & microphone audio. 100% private in-browser, no watermarks, unlimited duration.

Cut and trim MP4, WebM, and MOV videos directly in your browser with dual range sliders, looped segment preview, and instant frame snapshot capture. 100% private.

Convert MP4, WebM, and MOV video clips into loopable animated GIFs. Trim start and end times, select custom framerates (FPS), and resize dimensions locally.

Extract crisp, uncompressed PNG, JPEG, or WebP still images from any video file frame-by-frame with native resolution canvas rendering, interval burst extraction, and batch downloading.

Synthesize pure acoustic noise spectrums: Brown noise for deep sleep & ADHD, Pink noise for tinnitus masking, White noise for speech privacy, plus Blue & Violet noise with live visualizer.

Preview cinematic 3D LUT color grades on your videos with split-screen comparison, Teal & Orange, Bleach Bypass, Kodachrome, and exposure adjustments.

Convert video clips into seamless looping animated GIFs or Boomerang ping-pong animations with custom trim, FPS, and scale controls.

Play videos backward in reverse, craft ping-pong Boomerang loops, and adjust playback speed with client-side canvas frame rendering.

Record crystal-clear voice and microphone audio directly in your browser with real-time waveform visualizer, volume monitoring, and MP3/WAV export. 100% private and client-side.

Synthesize pure sine, square, sawtooth, and triangle sound waves from 20Hz to 20,000Hz. Includes Solfeggio healing frequencies, instrument tuning notes, and binaural beats.

Measure Beats Per Minute (BPM) by tapping your spacebar or screen in rhythm. Features rolling average tempo, timing consistency stability score, and synchronized metronome click.

Synthesize acoustic White, Pink, and Brown noise with binaural beats (Alpha, Theta, Delta) for study focus, deep sleep, ADHD calm, and tinnitus relief.

Slow down or speed up music and speech (0.25x - 3.0x), shift pitch by semitones without changing tempo, set A-B repeat loops, and export processed WAV files.

Adjust 10 frequency bands from 32Hz sub-bass to 16kHz treble using the Web Audio API. Features audio upload, sound presets (Bass Boost, Vocal, Rock), and live visualizer.

Translate any text to real CW Morse telegraph audio tones via Web Audio API. Customize WPM speed, pitch frequency, optical flasher lamp, and download 16-bit PCM WAV audio.

Detect fundamental acoustic frequency (Hz), closest musical note, octave, and microtonal cent deviation in real-time using YIN autocorrelation. Tune guitars, ukuleles, violins, and vocals.

Format, beautify, minify, and validate JSON data with syntax highlight.

Write GitHub-flavored markdown with split-screen real-time rendering. Format tables, code blocks, checklists, and export raw HTML or download .md files.

Convert special characters into HTML entities (named, decimal, hex) to prevent XSS attacks, or decode encoded HTML strings back to readable Unicode text.

Generate 11-step Tailwind color ramps (50-950), test WCAG accessibility contrast ratios, create harmonies (complementary, triadic), and export CSS/Tailwind code.

Create stunning linear, radial, and conic CSS gradients with multi-color stops, curated presets, interactive angle dials, and 1-click CSS/Tailwind code export.

Format, indent, beautify, or minify complex SQL queries (PostgreSQL, MySQL, SQLite, Oracle, BigQuery). Standardize uppercase keywords and tab spacing.

Visual multi-layer CSS box-shadow and soft UI Neumorphism generator. Customize blur, spread, offsets, opacity, inset shadows, and export clean CSS or Tailwind classes.

Generate up to 500 cryptographically secure UUIDs (v4, v7 Unix-epoch time-ordered, v1, nil). Customize uppercase, braces, hyphens, and export to JSON, CSV, or SQL.

Convert any text into natural speech directly in your browser. Choose from multiple neural system voices, adjust speed rate, pitch, and volume with live reading tracker. 100% free and client-side.

Deduplicate text lines, strip extra spaces, remove empty rows, eliminate HTML tags, sort alphabetically, and format delimiters (CSV, semicolon, space).

Edit SubRip (.srt) subtitle files, shift timestamps forward or backward to fix audio/video sync delays, find and replace dialogue, and export plain transcripts.

Translate text into the NATO Aviation Phonetic Alphabet (Alfa, Bravo, Charlie) and Morse code with real-time 700Hz telegraph audio synthesizer and WPM speed tuning.

Reverse letters, flip word order, invert text upside-down with Unicode symbols, and encode with Caesar shift or ROT13 ciphers in real time.

Analyze vocabulary repetition, keyword density, and 2-word & 3-word n-gram phrases in your articles or essays. Filter common stop words and export statistics to CSV.

Convert instantly between UTF-8 text, 8-bit binary, hexadecimal, decimal byte arrays, octal, and Base64 with an in-depth character-by-character Unicode byte inspector.

Accurately estimate silent reading time and presentation speech duration, analyze linguistic syllable structures, and calculate Flesch Reading Ease and Gunning Fog readability indices.

Convert post titles and accented text into clean, search engine friendly URL slugs with custom separators and diacritics removal.

Generate stylish fancy Unicode fonts for Instagram bio, TikTok, Facebook posts, and Twitter/X with one-click copy.

Generate Google search meta tags, Facebook Open Graph, and Twitter/X summary cards with interactive live snippet previews.

Generate high-reach, viral hashtags for Instagram reels, TikTok, YouTube Shorts, LinkedIn, and X by niche topic with one-click copy.

Simulate how your webpage appears when shared on Google Search, Facebook, Twitter/X, LinkedIn, and Discord. Test character length limits and generate HTML meta tags.

Validate character limits across Twitter/X, Instagram, LinkedIn, YouTube, TikTok, and Google SEO simultaneously. Track words, hashtags, mentions, and avoid truncation.

Construct precision Google Analytics 4 tracking links with standard UTM parameters, channel presets, URL sanitization rules, live QR code generator, and CSV history exports.

Calculate monthly loan payments, total interest, and amortization breakdown.

Calculate monthly loan EMI payments, total interest payable, and generate full monthly amortization schedules.

Discover the exponential power of compounding interest and disciplined long-term investing.

Calculate how inflation erodes purchasing power over time. Compare past vs future values with custom inflation rates and view year-by-year compounded progression tables.

Calculate the exact unit sales and revenue required to reach financial break-even. Analyze contribution margins, margin of safety, and view sensitivity tables.

Visualize how progressive marginal tax brackets really work. Calculate total tax owed, effective tax rate vs marginal rate, take-home paycheck schedules, and standard deduction impact.

Calculate how much interest and how many months you can save on your mortgage or loan by making extra monthly, annual, or one-time principal payments with complete amortization schedules.

Simulate long-term wealth compounding with inflation purchasing power discounting, annual contribution step-ups, and tipping point milestone detection.

Calculate total trip gas expenses, fuel consumption in liters or gallons, highway tolls, cost per passenger, cost per kilometer, and estimated CO2 carbon emissions.

Calculate aspect ratios (16:9, 4:3, 21:9, 9:16), rescale width and height while preserving proportions, and find physical screen diagonal dimensions.

Calculate restaurant gratuity tips, evaluate pre-tax vs post-tax totals, split the bill evenly among friends, and round up to the nearest dollar.

Add, subtract, multiply, and divide proper, improper, and mixed fractions with complete step-by-step LCM and GCD reduction breakdowns and decimal conversion.

Calculate sample and population standard deviation, variance, mean, median, mode, IQR, and render interactive frequency distribution histograms from any numeric dataset.

Solve complex trigonometric, logarithmic, power, root, and factorial math equations in radians or degrees with full keyboard support and calculation history.

Instantly convert numbers between Binary (Base 2), Octal (Base 8), Decimal (Base 10), Hexadecimal (Base 16), and arbitrary custom bases up to Base 36.

Calculate your exact daily water intake based on body weight, workout intensity, and climate. Includes cup/bottle counts, hourly drinking timeline, and glass tracker.

Instant multi-currency exchange converter supporting 32+ global fiat currencies including USD, EUR, VND, JPY, GBP, CNY, AUD, SGD with reciprocal rates and multi-currency comparison matrix.

Convert units across Length, Mass, Temperature, Digital Data, Speed, Pressure, Energy, Power, and Area. Supports metric and imperial standards with instant equivalent schedules.

Calculate exact age in years, months, days, and seconds, with next birthday countdown, Western Zodiac, and Chinese Lunar Can Chi.

Interactive multi-city world clock and meeting scheduler. Synchronize local times across New York, London, Tokyo, Hanoi, Paris, Sydney with visual 24-hour slider and working hours overlap.

Calculate optimal bedtimes and wake times aligned with natural 90-minute REM sleep cycles to prevent grogginess and sleep inertia. Includes power nap guides and .ics export.

Coordinate international meetings across multiple cities and time zones with a synchronized 24-hour visual scrubber, work/sleep availability ribbons, overlap finder, and .ics calendar export.

Calculate the exact time difference between two dates in years, months, days, hours, and exclude weekends for working days.

วัดสุขภาพร่างกายได้อย่างรวดเร็วตามมาตรฐานองค์การอนามัยโลก

Encrypt and lock sensitive files, photos, PDFs, and archives client-side using military-grade AES-256 GCM and PBKDF2 with zero cloud transmission.

Interactive 104-key ANSI keyboard layout tester. Detect dead switches, verify anti-ghosting with N-key rollover counter, and inspect raw event keycodes with click sounds.

Fullscreen monitor diagnostic tool to spot dead pixels, stuck subpixels, color uniformity, and backlight bleeding across 9 primary calibration colors plus high-speed pixel restorer.

Test webcam video resolution, actual framerate (FPS), mirror flip, take snapshot photos, and monitor microphone volume VU decibel meters with 100% client privacy.

Diagnose faulty mouse switches (detect double-click chatter <80ms), test all 5 mouse buttons & scroll wheel, measure CPS speed, and test 10-point multi-touch displays.

Measure Shannon entropy in bits, detect dictionary patterns, inspect character composition pools, and simulate brute-force crack times across RTX 4090 GPU rigs. 100% private in-browser.

Discover exact geographic location, Autonomous System (ASN), ISP, and coordinates for any IP address, with real-time WebRTC private IP leak auditing and CDN ping latency measurements.

Customizable spinning wheel for random picks, giveaways, classroom decisions and games.

The authentic Windows XP Minesweeper experience with retro face, flag counters, and sound.

Slide and merge matching number tiles on a 4x4 grid to reach the 2048 tile.

The classic Windows XP Klondike Solitaire card game on authentic green baize table.

Real-time glowing snake arena with 360° steering, boost speed, AI bots, and live leaderboard.

The legendary arcade maze game with Blinky, Pinky, Inky, Clyde, power pellets, and retro sounds.

Play classic 9x9 Sudoku across 4 difficulty levels (Easy, Medium, Hard, Expert). Includes pencil candidate notes, mistake checking, intelligent hints, and victory timer.

Play unlimited 5-letter Wordle puzzles with no daily limit. Features Daily Challenge mode, on-screen keyboard, Web Audio sound effects, stats tracking with streaks, and emoji share grids.

Balance any chemical reaction equation instantly with matrix algorithms, molar mass and stoichiometry.

Calculate molar mass (g/mol) and element mass percentages for any chemical formula and hydrate.

Solve kinematics, Newton's laws of motion, kinetic & potential energy, and centripetal circular motion.

Transcribe DNA to mRNA, find complementary strands, translate codons into amino acid peptide chains, and check GC content.

Interactive periodic table of elements with IUPAC data, electron configurations, electronegativity, orbitals, and physical properties.

Solve linear equations (ax+b=0), quadratic equations (ax²+bx+c=0 with discriminant Δ), and 2x2 linear systems with step-by-step solutions.

Boost reading speed from 200 to 1,000 WPM using Rapid Serial Visual Presentation (RSVP) with red Optimal Recognition Point (ORP) focal letter alignment.

Calculate resistance, tolerance, and temperature coefficient for 4, 5, and 6-band resistors with SVG graphics. Includes reverse Ohms-to-bands lookup and SMD chip code decoder.