What's new
Tools we added recently, newest first — 98 in the last 60 days.
9 tools
- Text & Dev HTML, CSS & JS Minifier Minify HTML, CSS and JavaScript by stripping spaces, line breaks and comments. Shows the size before and after, the savings and the gzipped size, and points to syntax errors by line and column. Nothing is uploaded.
- Text & Dev Chinese to Pinyin Converter Convert Chinese text to pinyin with tone marks, tone numbers, no tones or first letters, shown above each character for printing. Correct characters with several readings with a click. Works with traditional characters.
- Text & Dev Internet Speed Test Press one button to measure download and upload speed in Mbps plus ping and jitter, against the nearest Cloudflare location. Keep a history of results on this device.
- Time & Clocks Days Until Countdown How many days until Christmas, a birthday or an exam. List several events nearest first and show one full screen. Times and days since are supported too. Share by link; saved on this device.
- Life & Calc What Week Is It? Open it and see today's ISO 8601 week number, day of the year, days left and week of the month. Check any date, look up the dates of a week number, and list every week of the year.
- Print & Paper Class Timetable Maker Make a weekly class timetable by day and period. Subjects get matching colors automatically, with room and teacher if you like. Print on one A4 landscape page, save PNG or share by link.
- Life & Calc White Noise & Focus Sounds Background sound for study and work. Layer white, pink and brown noise with rain-, wave-, wind- and campfire-like sounds, set each volume, and use a 15–90 minute timer that fades out. All synthesized in your browser.
- Fun & Lottery Maze Generator A maze game that makes a new maze every time. Play 5×5 to 40×40 solvable mazes with arrow keys, swipes or tracing. Show the answer, print on A4 with an answer page, save PNG, or share the same maze by link.
- Time & Clocks Flip Clock A retro flip clock whose number cards flip as the time changes. Go full screen to turn a laptop or tablet into a big desk clock that keeps the screen awake. 12/24-hour, seconds, date and four card colors.
2 tools
- Work & Events Graph Maker (Bar, Line, Pie) Type numbers into a table or paste from Excel or Google Sheets and get a bar, horizontal bar, stacked, line, pie or donut chart instantly. Colorblind-safe palette, axis from zero. Save PNG/SVG, copy image, print, share by URL.
- Life & Calc Daily Routine Pie Chart Type your activities with start and end times and get a 24-hour pie chart laid out like a clock. Overnight sleep, free time and overlaps handled. For school routine charts and time audits. Save PNG/SVG, print, or print a blank circle.
1 tool
4 tools
- Text & Dev JSON Formatter & Validator Paste JSON to pretty-print or minify it. Syntax errors are shown with line and column, plus sort keys, a collapsible tree view and copyable JSON paths. Everything runs in your browser; nothing is uploaded.
- Text & Dev URL Encoder & Decoder Percent-encode text or URLs and decode strings like %E3%81%82 back to readable text. Choose component or full-URL encoding, and split or build query parameters. Runs in your browser; nothing is uploaded.
- Text & Dev Case Converter (camelCase, snake_case) Convert text between UPPER, lower, Title and Sentence case, plus camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE. Works line by line for variable names, file names and headings.
- Life & Calc World Clock & Time Zone Converter See the current time in cities around the world side by side. Convert a date and time across time zones and find a meeting slot that works for everyone, with daylight saving time handled automatically.
8 tools
- Life & Calc Standard Deviation & T-Score Calculator Paste a list of scores to get the mean, standard deviation (population and sample), z-scores, T-scores and ranks, or enter one score with the mean and SD. Shows the approximate percentile. Nothing is uploaded.
- Text & Dev Number Base Converter (Binary, Hex) Convert between binary, octal, decimal and hexadecimal as you type, with a bit view, two's complement for negative numbers and support for very large numbers. Runs in your browser.
- Life & Calc Speed, Distance & Time Calculator Enter any two of speed, distance and time to get the third. Mix units like km/h, mph, m/s, hours, minutes and seconds, and see the working. Handy for homework and travel estimates.
- Text & Dev Webcam Test Check your webcam instantly: live preview with the real resolution and frame rate, camera switching, mirror view and snapshots. Handy before a meeting or class. Video never leaves your device.
- Text & Dev Mic Test See whether your microphone works with a live level meter and waveform, then record a few seconds and play it back. Switch mics, spot clipping and compare noise suppression on/off. Nothing is uploaded.
- Text & Dev Speaker Test Check left/right channels and the frequency range of speakers or headphones: left, right and center test sounds, a frequency sweep, a tone generator and a high-frequency audibility check.
- Text & Dev Keyboard Tester Every key you press lights up on an on-screen keyboard. Find dead keys, test key rollover (how many keys at once) and catch key chatter (double input). US and JIS layouts, with key and code values.
- Text & Dev Dead Pixel & Refresh Rate Test Find dead, stuck and hot pixels with full-screen solid colors, and measure your monitor's real refresh rate (Hz). Also shows resolution, pixel ratio, color depth and HDR support.
3 tools
- Work & Events Offline POS Register A browser-only POS register and inventory that works with zero connectivity: barcode scanning, checkout, stock, sales CSV, QR sync between devices and Bluetooth receipt printing. Once opened it runs offline, and data stays on the device.
- Work & Events Event QR Tickets & Check-in Bulk-generate unique QR tickets for an event and check guests in with a phone camera. Hand them out by print, image ZIP or merged into a flyer PDF; repeat entries are flagged automatically. PC-to-phone sync, and it runs offline once opened.
- Work & Events Stamp & Punch Card Run stamp cards and punch cards from the browser. Print member QR cards, scan them on each visit to record stamps, rewards and punch-card uses. No app or sign-up for customers, and it runs offline once opened.
11 tools
- Work & Events LED Scrolling Text Banner Type a message and it scrolls across your phone screen like an LED sign. LED dots or bold text, red, green, yellow, white or rainbow, background color, speed, blink or a fixed message. Fullscreen, keeps the screen awake and shares by link — for concerts, airport pickups and shop signs.
- Time & Clocks Presentation Timer with Bells A presentation timer that rings bells 1, 2 and 3 with a desk-bell sound. Set bells before or after the end of the talk, or pick conference, lightning talk and interview presets. Big countdown, green/yellow/red stages and overtime display.
- Fun & Lottery Quiz Buzzer (with Sound Effects) A quiz buzzer for one computer or tablet shared by 2–8 players. Each player gets a keyboard key and a big on-screen button; once the host opens the question, the first press is shown huge. False starts, correct (ding-dong) and wrong (buzz) with scoring, plus drum roll, applause and other sound effects for parties and quiz nights.
- Fun & Lottery Word Wolf Pass-and-play Word Wolf on one phone: 3–10 players, 1–2 wolves, a discussion timer, voting, the wolf's last-chance guess and running scores. 200+ family-friendly word pairs, plus your own.
- Life & Calc Classroom Noise Meter A classroom noise meter for your projector: a needle meter, bouncing balls or a traffic light show Quiet, OK or Too loud. Adjustable limits, too-loud alerts and a quiet timer with goals. Nothing is recorded or uploaded.
- Work & Events Queue Number Display Show the queue number being called in huge digits on a projector or TV. Next plays a ding-dong chime with optional spoken announcements, plus a pickup board for ready orders, prefixes, counter names and a called list. Open the customer display in a separate window, synced with your control screen.
- Fun & Lottery Random Name Picker Paste a list of names and pick one at random — names spin and land huge on a projector or fullscreen. Remove picked names so nobody goes twice, pick groups, undo and keep a history. Your list stays in the browser.
- Time & Clocks Pomodoro Timer A Pomodoro timer that cycles 25-minute focus sessions and 5-minute breaks automatically, with a long break every 4 rounds. Fullscreen countdown, sound and notifications, and today's count — a focus and study timer.
- Fun & Lottery Bingo Card Generator Make free printable bingo cards: 75-ball number cards, 3×3 kids cards or word bingo with your own words. 1–200 numbered cards with no duplicates, 1, 2, 4 or 6 per page or as a PDF, plus a winner checker.
- Fun & Lottery Random Number Generator Pick random numbers in any range — no duplicates, exclusions, sorting, decimals, up to 1,000 at once. Draw mode shows one number at a time fullscreen with no repeats, for raffles, bingo and classrooms.
- Fun & Lottery Online Scoreboard A fullscreen online scoreboard for projectors and TVs. Tap to score, 2–4 teams, 2/3-point steps, undo, swap sides, a game timer and keyboard shortcuts — for classrooms, quiz nights and pickup games.
10 tools
- Image & Video Profile Picture Maker Turn a photo into a round, rounded or square profile picture with solid or gradient borders, AI background replacement, and every social media size plus a favicon in one ZIP. Your photo is never uploaded.
- Image & Video Passport & ID Photo Maker Make passport, visa and ID photos from a phone snapshot: pick the size, let AI swap the background to white or light blue, and lay several copies out on a 4×6 in print with cut lines. Your photo is never uploaded.
- Image & Video Background Remover Remove photo backgrounds with AI and get transparent PNGs. The AI runs in your browser, so images are never uploaded. Batch processing with ZIP, background color/image/blur replacement and erase/restore brushes.
- Text & Dev CSV Encoding Converter & Splitter Fix CSVs that look garbled in Excel by converting to UTF-8 with BOM or Shift_JIS, with automatic encoding detection. Split by rows or size with headers, pick columns, convert CSV ⇔ JSON. Handles tens of MB with no upload.
- Work & Events Organize PDF (Reorder, Compress, Password) Drag to reorder PDF pages, rotate, delete, duplicate and insert blank pages. Compress images to shrink the file, add or remove a password (AES-256) and strip metadata — on one screen, with no upload.
- Image & Video Audio & Video Transcription Transcribe meetings, interviews and video audio with Whisper entirely in your browser – nothing is uploaded. Export timestamped text or SRT/VTT subtitles, or record from your microphone.
- Image & Video Image to Text (OCR) Extract Japanese and English text from images, screenshots, photos and scanned PDFs. Paste with Ctrl+V, select an area, read vertical text and batch several images – nothing is uploaded.
- Text & Dev Furigana Converter Add furigana to Japanese text automatically. Skip kanji learned up to a school grade, show only non-Joyo kanji, fix readings with a click, export as ruby HTML or kana, and print vertical or horizontal.
- Life & Calc Loan Repayment Calculator Monthly payment and total interest for mortgages, car loans and personal loans. Compare annuity and equal-principal repayment, see the full amortization schedule (CSV), bonus payments, prepayment (shorter term vs lower payment), rising-rate scenarios and how much you can borrow.
- Text & Dev JWT Decoder & Hash Generator Decode JWT header and payload, show exp/iat/nbf as dates with time remaining, verify HS256 with a secret or RS256/ES256 with a public key (PEM/JWK). Hash text and files with MD5, SHA-1, SHA-256/384/512 and HMAC, and compare checksums. Nothing is uploaded.
1 tool
7 tools
- Work & Events Merge PDF Put several PDFs in the order you want and merge them into one. Shows page counts and thumbnails, and copies pages as they are so quality is kept. Nothing is uploaded — it all runs in your browser.
- Work & Events Split PDF & Extract Pages Extract the pages you need from a PDF, split it into single pages or every N pages (as a ZIP), and rotate or delete pages. Pick from thumbnails or type ranges like 1-3, 5, 8-. No upload.
- Image & Video PDF to Image Convert each PDF page into PNG, JPEG or WebP at 72–600 dpi with adjustable quality. Choose page ranges and download everything as a ZIP. Renders Japanese and other CJK PDFs correctly.
- Image & Video Image to PDF Combine JPG, PNG, WebP and other images into one PDF in any order. Choose A4, Letter and other page sizes, orientation and margins. JPEGs are embedded without recompression and phone photo rotation is fixed.
- Image & Video Audio Converter Convert MP3, WAV, M4A, FLAC or a video's audio into WAV, M4A (AAC) or WebM (Opus). Trim, convert to mono and change the sample rate. Your audio is never uploaded.
- Text & Dev IP Address Lookup Look up any IPv4 or IPv6 address: its type (public, private, CGNAT, reserved), reverse DNS name, and the organization, country and range from RDAP. Add a CIDR prefix to get subnet details.
- Text & Dev SSL Certificate Checker Enter a domain to fetch its SSL/TLS certificate: days until expiry, issuer, SANs, the full chain, TLS 1.0–1.3 support and the verification result (expired, hostname mismatch, self-signed).
12 tools
- Text & Dev Barcode Number Checker Enter a JAN, EAN, UPC or ISBN to get the format, whether the check digit is right, and which country registered the prefix. Calculates check digits and converts between ISBN-10 and ISBN-13.
- Life & Calc Battery Size Chart A searchable chart of cylindrical, coin, button and hearing-aid batteries with dimensions and voltage. Search by designation, alternative name (AG13, 357) or use, and see cells of the same size with similar voltage (within 0.2V).
- Fun & Lottery Chocolate Banana Maker Pick the banana shape, chocolate, toppings and a face. Five chocolates drawn with a dripped edge, and the face line switches colour to stay readable on any of them.
- Fun & Lottery Crepe Maker Pick the batter, cream, fruit, sauce and wrapper to build a crepe. Up to three fruits, plus ice cream and biscuit sticks, with the sauce drizzled on last.
- Fun & Lottery Fantasy Currency & Unit Maker Design the currency or measurement tiers of your own world and get a conversion table, with breakdowns like "1234 copper = 5 gold, 2 silver, 10 copper". Share the setup by URL.
- Text & Dev HTTP Status Codes A searchable reference of 89 HTTP status codes from 100 to 599. Filter by number, name or meaning and see whether each is cacheable and may carry a body, plus notes on 301 vs 308, 404 vs 410 and non-standard codes from nginx and Cloudflare.
- Fun & Lottery Shaved Ice Maker Pick a bowl, syrup, toppings and flag to build your own shaved ice. Seven syrups including strawberry, melon, blue Hawaii and matcha, plus condensed milk and rice dumplings. Save it as an image or share the URL.
- Life & Calc Mohs Hardness Chart Mohs hardness for gems and minerals listed with cleavage and toughness, plus everyday references like glass and household dust. Pick two and see which scratches which.
- Text & Dev Mojibake Generator Reproduce mojibake in ten encodings, or paste garbled text and have the encoding guessed and the original restored. When recovery is impossible the page explains why. Runs in your browser.
- Text & Dev QR Code Capacity Chart Capacity for QR versions 1-40 by error-correction level across all four modes. Paste a string to get the smallest version, module count and print size. The figures are measured with a QR library, not copied.
- Fun & Lottery Candy Apple Maker Choose the fruit - apple, crab apple, strawberry, grape or mandarin - and the candy colour. The candy is drawn translucent so the fruit shows through. Up to three toppings.
- Fun & Lottery Cotton Candy Maker Choose the colour, size, stick and decorations to make cotton candy. The rainbow option layers five shades, and you can add stars, hearts or a face. Save it or share the URL.
8 tools
- Text & Dev Code Preview Write HTML, CSS and JavaScript and see the result as you type. console.log and errors appear in a console pane, and you can check phone (375px), tablet (768px) or full width. Export as one HTML file.
- Text & Dev Test Combination Generator Turn factors and levels into a test matrix: the full cartesian product plus a pairwise set covering every two-factor combination. Compare the counts, exclude impossible pairs, copy as CSV, Markdown or TSV.
- Text & Dev DNS Lookup Look up a domain's A, AAAA, CNAME, MX, TXT, NS, SOA and CAA records with TTLs, with SPF highlighted and DMARC fetched automatically. Queries go straight from your browser over DNS over HTTPS.
- Text & Dev What Is My IP Shows the public IP address (IPv4 or IPv6) your connection is using, the country and network it maps to, and your browser's user agent, languages and screen size. The IP is never logged or stored.
- Life & Calc Prime Factorization & Divisors Factor any integer into primes with ladder-division working and 2³×3²×5 exponent form. Lists every divisor with the count and sum, tests primality, and finds the GCD and LCM of several numbers.
- Text & Dev robots.txt Checker Fetch and parse a site's robots.txt into a table of Allow, Disallow, Sitemap and Crawl-delay directives, then test any path against Googlebot and Bingbot with full longest-match, * and $ support.
- Image & Video SVG Converter Convert SVG to PNG, JPEG, WebP, GIF, BMP, ICO, TIFF or PDF. It draws straight from the vector, so any scale stays sharp, and ICO can pack 16–256 px into one favicon file.
- Life & Calc To-Do List A to-do list that saves in your browser – no sign-up. Enter to add, tick to complete, double-click to edit, reorder by arrows or drag. Overdue items turn red, #tags filter, and it prints as a checklist.
21 tools
- Life & Calc Age Calculator Exact age in years, months and days on any date, days lived, next birthday, zodiac, Japanese era and school entry/graduation years. Save family members to compare ages.
- Life & Calc BMI & Calorie Calculator BMI with category, ideal weight, basal metabolic rate (Mifflin-St Jeor / Harris-Benedict), daily calorie needs (TDEE) and calorie targets for losing or gaining weight, updated as you type.
- Life & Calc Compound Interest Calculator Future value and total interest from principal, monthly contributions, annual rate and years, with a year-by-year table and chart. Also solves the monthly amount needed to reach a target.
- Text & Dev Colour Contrast Checker WCAG contrast ratio for any two colours, with AA/AAA verdicts for normal and large text plus the 3:1 for UI components, a live preview, and the nearest passing colour when a level fails.
- Text & Dev CSS Generator Build gradients (linear/radial/conic), multi-layer box shadows with inset, stripe/dot/checker background patterns, and per-corner radius with borders — live preview, one-click CSS copy.
- Life & Calc Date Calculator Days, weeks, months and years between two dates with weekday/weekend breakdown, plus "N days / business days / months from a date" with the weekday. For deadlines and anniversaries.
- Life & Calc Fraction Calculator Fraction arithmetic with the working shown (common denominators, reciprocals, simplification). Mixed numbers and decimals accepted; results as fraction, mixed number and decimal.
- Image & Video Image Merge Combine several images into one as a vertical strip, a horizontal strip or a grid. Reorder them, set spacing and a background colour (transparent allowed), match widths or heights, and export as PNG, JPEG or WebP. Nothing is uploaded.
- Time & Clocks Metronome Browser metronome with 30–300 BPM, 1–12 beats per bar, subdivisions (quarter/eighth/triplet/sixteenth) and three click sounds. Tap tempo, space-bar control, visual beats and URL sharing.
- Life & Calc Price Calculator Tax-inclusive ⇔ tax-exclusive prices, discount rate ⇔ sale price, and cost/price ⇔ gross margin and markup, all on one screen and updated as you type. Rounding is selectable.
- Image & Video Image & Print Size Calculator Turn an image's pixel count into printed sizes from 72 to 350 dpi in mm and inches, and check it against 4×6, 5×7, postcard, B5, A4 and A3. Also works backwards from paper and dpi, and converts px ⇔ mm ⇔ inch ⇔ pt.
- Life & Calc Probability Calculator Permutations and combinations, gacha/lottery odds of at least k successes in n trials, deck draw odds without replacement, and expected value with standard deviation, all with distribution tables.
- Text & Dev QR Code Reader Read QR codes from dropped, pasted or camera-captured images. Detects URLs, email, phone, Wi-Fi (SSID/password) and contacts, and shows a link's domain before you open it. Nothing is uploaded.
- Life & Calc Ratio & Percentage Calculator Simplify ratios, split totals by ratio (whole-unit rounding keeps the total), percent of / percent change / value after change, and proportions a:b = c:x, as you type.
- Text & Dev Romaji Converter Hiragana, katakana and kanji to Hepburn, Kunrei or passport-style romaji. Kanji readings resolved in the browser; long-vowel and capitalization options; kana chart included.
- Fun & Lottery Seating Chart Maker Random classroom seating chart from rows × columns and names. Front-row requests, keep-apart pairs and aisles; reveal mode uncovers one seat at a time. Print, image and share URL.
- Work & Events Shift Schedule Maker Monthly shift schedule from days off, weekly limits and headcount per shift. Consecutive-day limits and closed days; understaffed days in red. Print, image, CSV and share URL.
- Life & Calc Slope & Angle Calculator Convert between angle, grade %, 1:n ratio, radians and roof pitch, and solve the slope triangle from run and rise. Includes ramp, road, roof and stair references with a labelled diagram.
- Work & Events Duty Roster Maker Fair duty rotation for cleaning, daily duty and chores. Days off, no consecutive turns, no double duty. Print, image, CSV and share URL.
- Image & Video Batch Watermark Add a text or logo watermark to many images at once and save them as a ZIP. Tune size, colour, opacity, angle, one of nine positions or a full tile, with a live preview. Nothing is uploaded.
- Text & Dev Full-width ⇔ Half-width Convert letters, digits, symbols, katakana and spaces between full-width and half-width, choosing which types to change. Merges half-width katakana voicing marks; hiragana ⇔ katakana too.