無料オンラインファイル変換ツール
画像、データファイル、ドキュメントをブラウザ上で100%ローカルに変換します。
全変換ツール
HEIC, WebP, PNG, JPG, SVG
iPhoneのHEIC写真をブラウザ上で即座にJPGに変換します（サーバーへの送信なし）。
Convert iPhone HEIC photos to PNG instantly, entirely in your browser — no upload required.
Convert PNG graphics to next-gen WebP format for faster website page loads. 100% private, client-side processing.
Convert JPEG photos to lightweight WebP format to speed up web pages and save bandwidth.
Convert downloaded WebP images into standard PNG format for easy editing and software compatibility.
Convert WebP images into universal JPEG files for email, documents, and printing.
Convert heavy PNG images to lightweight JPG files to cut file size by up to 70%.
Convert SVG vector graphics and logos into high-resolution PNG images instantly.
Convert PNG, JPG, WebP, or SVG images into Data URI Base64 strings for inline CSS and HTML.
Data Converters
JSON, CSV, YAML, SQL
Convert JSON arrays and API responses to CSV spreadsheets instantly in your browser.
Convert CSV spreadsheets and data tables into structured JSON arrays for development.
Convert YAML configuration files (Kubernetes, Docker Compose, OpenAPI) to JSON instantly.
Convert JSON objects and data payloads into clean, human-readable YAML configurations.
Format, validate, and prettify messy JSON data instantly. 100% private client-side formatting.
Convert JSON arrays into SQL INSERT queries for PostgreSQL, MySQL, and SQLite databases.
Decode Base64 Data URL strings back into downloadable PNG or JPG image files.
Convert Markdown files and README documents into clean semantic HTML markup.
Convert HTML markup and webpage code into clean, readable Markdown syntax.
Convert XML data feeds, RSS feeds, and configuration files into structured JSON objects instantly.
Convert JSON objects and API responses into clean, formatted XML documents.