データはブラウザの外に出ません。
すべてがブラウザ内で完結する無料ツール集。アップロードなし、サーバーなし、トラッキングなし。
ツール一覧
JSON Formatter & Validator
Format, validate and explore JSON — entirely in your browser.
XML Formatter & Validator
Format, validate and minify XML — entirely in your browser.
URL Encoder / Decoder
Encode and decode URL percent-encoded strings — entirely in your browser.
Base64 Encoder / Decoder
Encode and decode Base64 strings with URL-safe option — entirely in your browser.
JWT Decoder
Decode and inspect JWT tokens — header, payload, expiry — entirely in your browser.
Image Compressor
Compress JPEG, PNG and WebP images without losing quality — entirely in your browser.
HEIC to JPG Converter
Convert iPhone HEIC photos to JPEG or PNG — entirely in your browser.
近日公開
EXIF Metadata Remover
Strip GPS, camera and personal metadata from photos — entirely in your browser.
PDF Tools
Merge, split and password-protect PDF files — entirely in your browser.
Large CSV Splitter & Viewer
Split large CSV files by row count and preview data — entirely in your browser.