無料オンラインツール 29+ 種類すべて

すべて一か所に。フィルターで目的のツールをすぐに見つけられます。

画像ツール

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Image Converter (PNG · JPG · WebP) Convert images between PNG, JPG and WebP — privately in your browser.
Image Compressor Shrink JPG and WebP file sizes without leaving your browser.
Image Resizer Resize images to exact dimensions while keeping aspect ratio.
Image to Base64 Turn an image into a Base64 data URI for inline embedding.

PDFツール

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Images to PDF Combine JPG and PNG images into a single PDF document.

テキスト・SEO・開発ツール

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Word Counter Count words, characters, sentences and reading time in real time.
Case Converter Convert text to UPPERCASE, lowercase, Title Case, camelCase and more.
Lorem Ipsum Generator Generate placeholder paragraphs for mockups and designs.
Slug Generator Turn any title into a clean, SEO-friendly URL slug.
JSON Formatter & Validator Beautify, minify and validate JSON in your browser.
Base64 Encode / Decode Convert text to and from Base64 with full Unicode support.
URL Encoder / Decoder Percent-encode and decode URLs and query strings.
Hash Generator (SHA-256) Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes.
UUID Generator Generate random version-4 UUIDs in bulk.
Password Generator Create strong, random passwords that never leave your device.
QR Code Generator Create downloadable QR codes for links, text and Wi-Fi.

計算機・変換ツール

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Unit Converter Convert length, weight, temperature, area, speed and data.
Percentage Calculator Work out percentages, ratios and percent change instantly.
BMI Calculator Calculate your Body Mass Index and see your category.
Age Calculator Find your exact age in years, months and days.
Tip Calculator Split the bill and calculate the tip per person.
Zakat Calculator Estimate Zakat due on your eligible wealth (2.5%).
Currency Converter Convert between world currencies with live exchange rates.

AIツール

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Text to Speech Read any text aloud with natural browser voices — free.
Text Summarizer Condense long text into the key sentences automatically.
Keyword Extractor Find the most frequent keywords in any text for SEO.

暗号資産ツール

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Live Crypto Price Check live cryptocurrency prices and 24h change.
Satoshi Converter Convert between BTC, satoshi, bits and mBTC.
Crypto Address Validator Check the format of Bitcoin and Ethereum addresses.

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