Sand Timer
A timer that displays a beautiful hourglass on your screen. Watch the sand flow while you focus, cook, or run a quick game.
Time & Clocks 06
Countdown Timer
A beautiful countdown timer you can blow up to full screen. Great for streams, events, and classrooms where everyone watches the clock together.
Multi Timer
A Gantt-chart style multi-timeline timer to manage multiple kitchen appliances at once. See all finish times at a glance and share settings via URL.
Digital Clock
An immersive full-screen digital clock. Mix clock styles, theme colors, 24h/12h, seconds, font weight, Zen Mode, and auto theme switching to build your ideal focus clock.
Analog Clock
An immersive full-screen analog clock. Mix face styles, theme colors, second hand, smooth ticking, date, and Zen Mode to build your ideal focus clock.
Stopwatch
A full-screen online stopwatch with a large, legible display. Start, stop, lap, and reset with one click. Combine styles, theme colors, and milliseconds freely.
Image & Video 09
PhotoBatch
Batch-prep photos before posting: unify size with adjustable crops, mosaic & emoji stamps, auto-enhance filters, and WebP/JPEG/PNG conversion — with an X-style editor for finishing each shot. EXIF & GPS removed automatically; everything runs in your browser.
LocalCanvas
Apply mosaic, crop, and export images entirely in your browser without uploading them. Built for privacy-first local processing.
Local Video Editor
A no-sign-up, fully in-browser video editor that cuts segments from several videos, lines them up, and composites captions and BGM into one MP4. No upload; loads 4K and outputs Full HD.
Video Converter
WebP Converter
Convert PNG and JPEG images to the lightweight, high-quality WebP format right in your browser. Batch convert without uploading anything.
Image Converter
Convert WebP back to PNG or JPEG — and the other way, in bulk. Choose the background color when flattening transparency to JPEG. Images never leave your browser.
MP4 Fast Start
Convert non-progressive MP4 files to Fast Start in your browser. Reorders the moov atom to the front—no re-encoding, so quality and size are preserved.
EXIF Cleaner
Remove EXIF metadata (GPS location, timestamp, camera info, etc.) from your images entirely in the browser — no upload required. Supports JPEG, PNG, WebP, and HEIC.
Color Palette
Automatically extract dominant colors from any image and generate a color palette. One-click copy of HEX / RGB / HSL, auto-generate Tailwind config, and preview your palette in a live UI mockup. No upload required — runs entirely in your browser.
Text & Dev 15
Character Counter
Paste your text and instantly see characters, lines, paragraphs, words, and manuscript page counts. Perfect for social drafts and writing — runs entirely in your browser.
Keigo Converter
Free tool that turns casual Japanese into polite keigo drafts. Three modes plus a business NG-phrase checker. No sign-up — runs entirely in your browser.
Desu/masu ⇔ Da/dearu Converter
Free tool that converts Japanese between polite (desu/masu) and plain (da/dearu) styles both ways in one click. Style-mix checker and quote protection. No sign-up — runs entirely in your browser.
Fuseji Censored-Text Generator
Free tool that batch-masks names and titles in Japanese text with fuseji symbols (〇〇, 佐〇…) to dodge search. Auto-suggests proper nouns, 4 modes × 6 styles. No sign-up — your text never leaves the browser.
Markdown Table Generator
Paste TSV/CSV from Excel or spreadsheets and instantly convert to a formatted Markdown table. Smart alignment, transpose, ASCII art output, and keyboard shortcuts. Browser-based, free.
Markdown Preview
Write Markdown and see a real-time preview. Export to PDF with a beautiful layout. Supports GFM (tables, task lists, strikethrough), auto-save. No upload, no registration, free.
Text Diff Checker
Compare two texts, code snippets, or JSON side by side in your browser. Switch between character, word, and line granularity; ignore whitespace or newlines; auto-format JSON; export an HTML diff report. Fully local, free.
Table Converter
A developer-grade table converter. Converts between TSV, CSV, Markdown, and JSON. Auto-infers column types to generate TypeScript Interface, Zod schema, and SQL DDL. Rich preview for color codes, URLs, and emojis. Fully local, no data sent.
Mermaid Editor
A browser-based diagram editor using Mermaid.js. Create flowcharts, sequence diagrams, and more—saved locally across multiple files.
Base64 Converter
Convert text and files to and from Base64. Auto-detects encode vs. decode, previews images and PDFs, and generates img, CSS, and Markdown snippets. Drag & drop supported. Fully local, free.
Regex Tester
A fully local regex tester that runs in your browser. Real-time match highlighting, capture group extraction, sanitize & copy to mask sensitive data, CLI command generation for grep/sed/awk/rg, and an infra-ready prefab library. Runs entirely in your browser; your data is not sent to any server.
Timestamp Converter
Convert UNIX timestamps and dates both ways. Extract time from Snowflake, ULID, UUIDv7, and ObjectId, parse logs in bulk, and do date arithmetic and diffs. Fully in-browser, free.
Cron Generator
A fully local Cron schedule generator. Describes 5-field cron expressions in plain English, shows upcoming run times, and generates copy-ready YAML / Bash for GitHub Actions, Kubernetes, Docker, and AWS EventBridge. Your data is not sent to any server.
Dummy Data Generator
Generate up to 100,000 rows of dummy JSON / CSV data right in your browser. Includes niche Japan-specific types like fictional My Number, invoice registration numbers, and traditional Japanese colors.
Local Mask
Auto-detect and mask sensitive data — names, emails, phones, addresses, card numbers, API keys — fully in your browser, then restore in one click. Safe prep before pasting into ChatGPT or Claude. Nothing is uploaded.
Fun & Lottery 20
Amidakuji
A multilingual Amidakuji (ghost-leg lottery) for 2 to 200 players, with group-split mode, adjustable density, reveal animation, URL sharing, image export, and local history.
Omikuji Maker
Create your own custom omikuji fortune and share it with friends. Set fortunes and messages, generate a short URL. No login required.
Lucky Draw
A full-featured lottery drum machine. Manage prize inventory, spin with animation and sound effects, and share settings via URL or JSON. Kiosk mode included. Runs entirely in your browser.
Bingo Machine
A real bingo machine that runs in your browser. Press the button and a random number is drawn. Fullscreen mode makes it perfect for parties and kids' events.
Dice Roller
A real 3D dice roller in your browser. Roll 1 to 6 dice at once, with auto sum and history. Great for board games, RPGs, and quick decisions.
Coin Toss
Flip a coin with cryptographic randomness — strictly 50:50. Toss multiple coins, set custom labels, sound feedback, and share settings via URL.
Roulette & Duty Maker
Add items and spin. A roulette wheel for fair random decisions — chores, rotas, dinner menus and more. Adjust item weights, use duty-rotation mode, save as image, and share via URL. Fully browser-based, no sign-up, free.
Sugoroku Maker
Create original sugoroku board games and share via URL instantly. Set tile types, money effects freely. No sign-up, no server storage, up to 8 players.
Tournament Bracket
Auto-generate a tournament bracket from a list of participants. Automatic seeding and BYEs, click to advance, share progress via URL. No sign-up required.
Team & Seat Maker
Auto-generate team splits and seating charts from a member list. Balance by gender or skill, set no-pair constraints, drag to swap, share via URL. No sign-up required.
Secret Cipher Maker
Transform your messages into emoji ciphers using a secret passphrase. Have fun exchanging secret messages with friends!
Zalgo Text Generator
Free Zalgo (cursed/glitch) text generator with a built-in remover. Adjust intensity with three sliders and restore garbled text — all in your browser.
Fancy Text Generator
Free fancy text generator: 22 font-like Unicode styles (𝐛𝐨𝐥𝐝, 𝓼𝓬𝓻𝓲𝓹𝓽…) previewed at once with one-tap copy and social compatibility hints — all in your browser.
Typing Sushi Chef
A brutally hard typing game: 10-second limit, instant death on a typo. Type the romaji of sushi toppings and release the last letter on the gold PERFECT band to press each piece. Race your own ghost. Records stay in your browser, free.
Sushi Set Maker
Free tool to build your ideal sushi lineup and eating order from 57 conveyor-belt-chain staples. Drag to reorder, save named sets in your browser, share with a URL. No sign-up, nothing sent to a server.
Takoyaki Master
A free takoyaki game that realistically recreates a 9-hole grill's uneven heat and the half-flip technique. Juggle a hot center and cool corners, turn each ball 90° twice to hit that golden window, collect cheese, mochi and the rare giant octopus, and compete on a daily stall. No sign-up, records stay on your device.
Finger Doodle
A super-simple free drawing toy for ages 1+. Trace to draw rainbow lines, tap to pop bubbles, and everything fades on its own so the canvas never fills up — no cleanup. No color picker: every touch makes a beautiful color. Pleasant sounds (can be off), a grown-up lock and full screen guard against mishaps. No sign-up, no install, no ads, records stay on your device.
Flame Color Fireworks
Learn the chemistry of flame tests while designing and launching your own fireworks. Blend metals, choose shape and burn temperature, and share recipes by URL. Quests plus sound and wind effects. Runs in your browser, no signup, free.
Pochi Pochi Planet
A keyboard sound-and-light play toy for toddlers — every key press fills the screen with colorful animations and fun synthesized sounds. No install, completely free.
Minecraft Map Tool
Plan coordinates across Overworld, Nether, and End with local-only markers and Nether gate links.
Life & Calc 10
Bill Splitter
Even or weighted bill splitting from just the total and headcount. Rounding, a remainder roulette, and QR/URL setup sharing. In-browser, no sign-up, free.
Recipe Scaler
Paste ingredients to scale recipes by servings or ratio. Back-calculate seasonings from target salt %, convert g ↔ tbsp/tsp. Browser-based, no sign-up, free.
Salt & Seasoning Calculator
Enter dish weight and target salt % to instantly calculate how much soy sauce, miso, dashi, and 17 other seasonings you need—in grams and tablespoons. Presets, custom seasonings, and URL sharing. Browser-only, free.
Room Simulator
Place furniture, fixtures, and appliances to simulate room layout and movement flow directly in your browser.
Maintenance Log
A browser-only maintenance log for bikes and cars. Record by voice, transfer between devices via QR/URL, generate a share card image, and auto-calculate service intervals by vehicle class. No registration, free.
Japanese Zodiac & Age
Look up the Japanese zodiac, Western/kazoe age, Japanese era, yakudoshi, longevity celebrations, school years, and generation from any birth year. Searchable 1920-2050 table.
One-Tap Timestamp Maker
Record everyday routines with a single tap, stored locally in your browser. Multiple targets, start/stop tracking, elapsed time display, undo, and webhook integration. Fully browser-based, free.
Study Pacemaker
Free study planner that turns a deadline and question count into the daily/weekly pace and finish date you need. Log questions per day, drill with spaced repetition, and branch off for sudden tasks. Data stays in your browser.
REWARD//DASH
A time-attack dashboard: declare your work hours and rewards first, then race to finish early and win free time. Earliest finish and today's buffer update in real time. Data stays on your device, no signup, free.
Workday Countdown
Count down to your deadline in actual workdays, subtracting weekends, holidays and your own days off. Add tasks to get the pace you need per day. Multiple projects, no signup, data stays in your browser. Free.