Issue 001 · カナダ、オンタリオ
作るのは ツール,
ローンチページではありません。
開発者、クリエイター、ゲーム開発者のための 116 個の無料ブラウザツール - 画像を一切アップロードしない background remover から、スプライトのコリジョンをトレースする physics editor まで。すべて自分のマシン上で動きます。
· アップロードなし· サインアップなし· ツール内広告なし· ずっと無料
712 · Est. 2026
116
リリース済みツール
10
カテゴリー
0
アップロードされたバイト
$0
一切
注目
いま 作っているもの。
更新日 2026-09-05
01 / メディア & クリエイター
Background Remover
Erase any image background in seconds with the ISNet AI model - 100% local, nothing uploaded, no signup, no watermark
開く →
02 / カラー & デザイン
Physics Editor
Free online sprite hitbox editor - auto-trace collision polygons and export for Phaser, Matter.js, Rapier or any 2D engine
開く →
03 / Formatter & Validator
JSON Formatter
Pretty-print, minify, and validate JSON instantly
開く →
04 / 計算機 & 金融
AI Cost Comparator
Paste a prompt and compare per-call, per-day and per-month cost across 12 AI models
開く →
最新
リリース順に、新着ツール。
このサイトのすべてのツールは、小さな「あったらいいな」から始まりました。有料版より本当に速いと確信できたときだけ公開します。
インデックス
すべてのツール、 セクション別。
116 件
§01テキスト & 文字列
9 ツール
- 096Word CounterCount words, characters, sentences, paragraphs, reading time→
- 097Case ConverterConvert text to UPPERCASE, lowercase, camelCase, snake_case, kebab-case, and more→
- 099Text DiffCompare two texts and highlight the differences→
- 100Find & ReplaceBulk find and replace text with regex support→
- 086SlugifyTurn any text into a clean URL slug - Unicode-aware→
- 088String EscapeEscape or unescape strings for JSON, JavaScript, and XML→
- 091Diff CheckerCompare two blocks of text with a line-by-line side-by-side diff→
- 069Token CounterEstimate tokens and API cost for GPT-4o, Claude, Gemini, and Llama→
- 001Em Dash RemoverPaste AI text and instantly replace every em dash with a plain hyphen→
§02Encoder & Decoder
5 ツール
- 101Base64 Encoder / DecoderEncode text or files to Base64 and back→
- 102URL Encoder / DecoderPercent-encode or decode URL components instantly→
- 103JWT DecoderDecode JSON Web Tokens and inspect claims→
- 104HTML EntitiesConvert special characters to HTML entities and back→
- 093Image to Base64Convert any image to a Base64 data URI - for inline CSS or HTML→
§03Formatter & Validator
5 ツール
- 105JSON FormatterPretty-print, minify, and validate JSON instantly→
- 106Regex TesterTest JavaScript regular expressions with live matches→
- 107SQL FormatterFormat SQL queries with proper indentation and keyword capitalization→
- 085JSON DiffStructural diff of two JSON documents - added, removed, changed→
- 078User-Agent ParserParse any User-Agent string into browser, OS, device, and engine→
§04Minifier & Beautifier
4 ツール
§05データ変換
15 ツール
- 111JSON to CSVConvert JSON arrays to downloadable CSV→
- 080Timestamp ConverterConvert between Unix time, ISO 8601, and human-readable dates→
- 082Markdown to HTMLConvert Markdown to clean HTML with live preview→
- 083YAML ↔ JSONConvert YAML to JSON and back with full syntax validation→
- 084JSON → TypeScriptGenerate TypeScript interfaces or types from a JSON sample→
- 087Base ConverterConvert between binary, octal, decimal, and hexadecimal→
- 092CSV to JSONConvert CSV data to JSON - with auto-type coercion→
- 094HTML to MarkdownConvert HTML back to clean Markdown with configurable style→
- 095PX to REMConvert between pixels and REM units for responsive CSS→
- 070JSON SchemaInfer a JSON Schema (draft 2020-12) from a JSON sample→
- 071.env ↔ JSONConvert dotenv files to JSON and back - with secret masking→
- 072cURL ConverterPaste a curl command, get JavaScript fetch, axios, or Python requests code→
- 074Tailwind → CSSConvert Tailwind utility classes to plain CSS→
- 076TOML ↔ JSONConvert TOML config to JSON and back - handles tables and array-of-tables→
- 028SVG → JSXPaste any SVG → get a clean React component with prop-forwarding and camelCase attributes→
§06カラー & デザイン
8 ツール
- 112Color ConverterConvert between HEX, RGB, HSL, and CMYK with live preview→
- 113Palette GeneratorGenerate harmonious color palettes from a base color→
- 089CSS GradientDesign linear, radial, and conic CSS gradients with live preview→
- 075Box ShadowDesign multi-layer CSS box-shadows with live preview→
- 026Contrast CheckerCheck text/background contrast against WCAG 2.1 AA and AAA - live preview→
- 027GlassmorphismDesign frosted-glass CSS cards with live preview and copy-ready code→
- 005Physics EditorFree online sprite hitbox editor - auto-trace collision polygons and export for Phaser, Matter.js, Rapier or any 2D engine→
- 004Design StudioDesign t-shirts, stickers, posters and social posts in your browser - text, shapes, emoji stickers, image uploads, PNG export. No signup.→
§07ハッシュ & 暗号
1 ツール
§08ジェネレーター
12 ツール
- 098Lorem IpsumGenerate placeholder text - paragraphs, sentences, or words→
- 115Cron GeneratorBuild and explain cron schedules visually→
- 116Password GeneratorGenerate strong, random passwords with a strength meter→
- 079UUID GeneratorGenerate one or thousands of UUIDs - v4 random or v7 time-ordered→
- 081QR Code GeneratorCreate custom QR codes with colors and downloadable PNG/SVG→
- 090Meta Tag GeneratorGenerate SEO, Open Graph, and Twitter Card meta tags with preview→
- 073HTTP Status CodesSearch and browse every HTTP status code with common causes→
- 077ASCII ArtTurn text into ASCII art banners for READMEs and CLIs→
- 022Prompt EnhancerPaste a rough prompt - get a structured version with role, context, constraints, format, and examples→
- 023System Prompt GeneratorGenerate production-ready system prompts for custom GPTs, Claude Projects, agents, and Cursor rules→
- 031Mermaid EditorWrite Mermaid diagrams with live preview and export as SVG or PNG→
- 032Emoji PickerSearch every emoji by name or keyword - one-click copy to clipboard→
§09メディア & クリエイター
18 ツール
- 009Screen RecorderRecord your screen, tab, or window with audio - save as MP4 or WebM, no install, no watermark→
- 010Webcam RecorderRecord video from your webcam with mic audio - private, no upload→
- 011Voice RecorderRecord voice memos, podcasts, or narration - save as WebM audio→
- 012Image CompressorCompress JPG, PNG, and WebP images with adjustable quality - private, in-browser→
- 013Image ResizerResize images to exact pixel dimensions or percentages - with aspect-ratio lock→
- 014Image ConverterConvert between PNG, JPG, and WebP in your browser - batch supported→
- 015YT ThumbnailDownload YouTube video thumbnails in every resolution - HD and Max-Res→
- 016Text to SpeechConvert text to natural-sounding speech with 100+ voices - free, in-browser→
- 017Speech to TextTranscribe your voice to text live - 40+ languages, free, in-browser→
- 018Aspect RatioCalculate width, height, and ratio for video, image, and screen sizes→
- 019Hashtag GeneratorTurn any topic into a curated hashtag set - mixed volume, ready to copy→
- 020Fancy TextTurn plain text into 30+ Unicode font styles for bios, captions, and DMs→
- 021Viral Sound Effects100+ trending 2026 TikTok, Reels & YouTube Shorts sound effects - cash register, vine boom, bruh, aughhh, and more - free MP3 + WAV→
- 024Favicon GeneratorUpload an image → get every favicon size, apple-touch, PWA icons, ICO, and the HTML snippet→
- 025App Icon GeneratorOne 1024×1024 image → full iOS, Android, and PWA icon sets in a zip→
- 030Placeholder ImageGenerate solid-color or gradient placeholder images at any size - download PNG→
- 006Background RemoverErase any image background in seconds with the ISNet AI model - 100% local, nothing uploaded, no signup, no watermark→
- 003Blur BrushPaint blur or pixelation over any part of an image - for hiding faces, plates, IDs, or sensitive info→
§10計算機 & 金融
39 ツール
- 033Percentage CalculatorWhat is X% of Y, X is what % of Y, percent increase, decrease, and change→
- 034Mortgage CalculatorEstimate your monthly mortgage payment, total interest, and full amortization schedule→
- 035Loan / EMI CalculatorCalculate monthly EMI, total interest, and total payable for any personal, auto, or student loan→
- 036BMI CalculatorCalculate Body Mass Index from height and weight - metric (cm/kg) or imperial (ft·in/lb)→
- 037Age CalculatorCalculate exact age in years, months, and days from any date of birth to any date→
- 038Date CalculatorCalculate days between two dates, or add/subtract days, weeks, months, or years from any date→
- 039Tip CalculatorCalculate the tip, total, and per-person amount when splitting a restaurant bill→
- 040Discount CalculatorCalculate the sale price, amount saved, and final price with sales tax from a percent-off discount→
- 041Compound Interest CalculatorCalculate future value with compounding interest, monthly contributions, and year-by-year growth→
- 042Simple Interest CalculatorCalculate simple interest (I = P × R × T) for a loan or investment in years, months, or days→
- 043Salary CalculatorConvert hourly wage to annual salary and daily, weekly, and monthly gross pay→
- 044Time Duration CalculatorCalculate hours worked between a start and end time, minus break minutes→
- 045Unit ConverterConvert between metric and imperial units - length, weight, temperature, volume, area, speed, and time→
- 046GPA CalculatorCalculate GPA on the standard US 4.0 scale from letter grades and credit hours→
- 047Grade CalculatorCalculate your current weighted class grade and what score you need on the final exam→
- 048Calorie Calculator (BMR/TDEE)Calculate BMR, TDEE, and daily calorie targets for weight maintenance, loss, or gain→
- 049Body Fat CalculatorEstimate body fat percentage from neck, waist, and hip circumference using the US Navy formula→
- 050Pace CalculatorCalculate running pace, finish time, or distance for 5K, 10K, half marathon, or marathon→
- 051Pregnancy Due Date CalculatorEstimate your due date from LMP, conception date, or ultrasound scan (Naegele's rule)→
- 052Scientific CalculatorType any expression: +, −, ×, ÷, ^, %, sin, cos, tan, log, ln, sqrt, exp, n!, π, e→
- 053Sales Tax / VAT / GST CalculatorCalculate sales tax, VAT, or GST - add tax to a net amount or reverse it out of a gross amount→
- 054Investment CalculatorProject future value of an investment with monthly contributions, CAGR, ROI, and real (inflation-adjusted) balance→
- 055Retirement CalculatorEstimate your retirement nest egg and the sustainable monthly income it can provide→
- 056ROI CalculatorCalculate return on investment, net profit, and annualized ROI (CAGR) from any investment→
- 057Markup & Margin CalculatorCalculate selling price, profit, gross margin, and markup - three input modes→
- 058Break-Even CalculatorFind the units and revenue needed to cover fixed costs and hit a target profit→
- 059Net Worth CalculatorTrack total assets and total liabilities to see your personal net worth balance sheet→
- 060Car Loan CalculatorEstimate your monthly auto-loan payment including sales tax, down payment, and trade-in value→
- 061Fraction CalculatorAdd, subtract, multiply, or divide fractions - result shown simplified, as mixed number, and decimal→
- 062Ratio CalculatorSimplify a ratio, solve A:B = C:D for a missing value, or scale a ratio by any factor→
- 063Random Number GeneratorGenerate one or many random integers in any range - with unique and sort options→
- 064Dice RollerRoll polyhedral dice with quick presets or standard dice notation (2d6, 3d20+5, etc.)→
- 065Statistics CalculatorPaste any data set to see mean, median, mode, range, variance, and standard deviation instantly→
- 066Binary/Hex CalculatorDo arithmetic and bitwise operations in binary, octal, decimal, or hex - see the result in all four→
- 067Quadratic SolverSolve any quadratic ax² + bx + c = 0 - real or complex roots, discriminant, and vertex→
- 068Prime FactorizationTest if a number is prime and get its full prime factorization plus divisor list→
- 007True Hourly RateSee the real hourly rate you earn after taxes, health, tools, retirement and unpaid admin→
- 008AI Cost ComparatorPaste a prompt and compare per-call, per-day and per-month cost across 12 AI models→
- 0022027 CalendarA full 2027 calendar with events, notes, and browser reminders - all stored locally→
コロフォン
カナダ、オンタリオで制作: Shan。Instrument Serif と Plus Jakarta Sans を使用。すべてのツールは完全にブラウザ上で動作 - テレメトリなし、アカウントなし、GPU レンタルなし、VC マネーなし。ただのツールです。