🖼️ 画像圧縮ツール
JPEG・PNG・WebP画像をブラウザ上で圧縮・軽量化できます。複数枚まとめて処理可能です。
🖼️
ここに画像をドラッグ＆ドロップ
またはクリックしてファイルを選択
またはクリックしてファイルを選択
※ 処理はすべてブラウザ内で完結します。画像はサーバーに送信されません。
※ 対応形式：JPEG・PNG・WebP
※ WebP形式への変換はSafari 14以降・Chrome・Firefoxで対応しています。
関連ツール
No registration required. All tools are completely free. All processing is done in your browser — your files are never sent to a server.
🎙️
Voice Memo & Recorder
Record, play back, and download audio for free. No registration required. Works entirely in your browser.
🖼️
SVG to PNG Converter
Convert SVG files to PNG with custom size. Perfect for favicons and OGP images.
🎨
ASCII Art Generator
Convert text and images to ASCII art. Switch font styles and color themes. Perfect for SNS and code comments.
📅
Date Calculator
Calculate the difference between two dates, countdowns, and date arithmetic. Business day calculation included.
⚖️
BMI Calculator
Calculate BMI easily for free. Displays judgment, ideal weight, and advice. Gender-compatible with copy function.
🍅
Pomodoro Timer
25-minute focus, 5-minute break Pomodoro timer. Work log, focus score, SNS sharing, and custom time settings.
🍺
Bill Splitter
Easily split bills for parties, travel, and meals. Supports equal split and individual amounts.
🔑
Password Generator
Generate secure passwords instantly in your browser. Customize length, uppercase, lowercase, and symbols.
📝
Character Counter
Count characters in real time for free. Supports SNS character limit checks and report word counts.
✂️
PDF Splitter
Split PDFs by page range or one page at a time.
📎
PDF Merger
Merge multiple PDFs into one file.
🔄
PDF Rotator
Rotate PDF pages individually or all at once.
📱
QR Code Generator
Instantly generate QR codes from URLs or text. No registration required. Download directly from your browser.
🗂️
JSON Formatter
Format and validate JSON for free online. No registration required. Files are never sent to a server.
📊
CSV Formatter
Format and verify CSV files entirely in your browser. No login required, files never leave your device.