Favicon & App Icon Generator

Generate favicon.ico, Apple touch icons, PWA 192x192/512x512 PNGs, and HTML head tags from a single logo image.

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主な特徴とプライバシー保証

  • ✓ 100%ブラウザ内完結: データは端末外に出ず、外部サーバーに送信されることはありません。
  • ✓ リアルタイム高速出力: ネットワーク遅延ゼロ、入力と同時に即時反映・高速コピー。
  • ✓ 永久無料＆制限なし: 会員登録不要、課金なし、1日の利用制限も一切ありません。
  • ✓ 標準規格準拠: RFC、ISO、W3Cウェブ標準仕様に厳密に準拠して設計されています。

Generate all favicon and PWA icon sizes in seconds

Upload your logo or icon image to automatically generate 16×16, 32×32, Apple touch 180×180, and PWA 512×512 PNG icons with copyable HTML head tags and webmanifest snippets.

技術仕様とアーキテクチャ

Technical Standard:
W3C HTML5 Recommendation & WHATWG Living Standard
Execution Environment:
100% Client-Side Browser Sandbox
Data Privacy:
Zero Server Storage / No Tracking
Processing Speed:
Real-time local CPU execution
Cross-Platform:
Works on Windows, macOS, Linux, iOS & Android

High-Entropy Generation & Deterministic Patterns

Generators produce unique identifiers, passwords, text patterns, or graphic assets. For security-sensitive outputs (such as UUIDs and passwords), the tool uses cryptographically secure pseudo-random number generation (CSPRNG via the Web Cryptography API), ensuring maximum entropy and zero collision risk. Non-random patterns follow official standard schemas.

1

Provide Input

Enter, paste, or upload your data into the input field above.

2

Configure & Process

The tool immediately processes your input in real time according to your chosen settings.

3

Copy or Save

Use the Copy button to copy the output to your clipboard, or download the result to your device.

開発者メモ: Cryptographically generated tokens meet enterprise compliance requirements for API keys, secret salts, and database primary keys.

主な利用シーン

  • Generate complete favicon sets for new web applications and blogs
  • Prepare Apple touch icons and PWA webmanifest assets
  • Convert SVG or high-res PNG logos into crisp 16×16 and 32×32 favicons

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よくある質問

What image format should I upload for the favicon generator?
PNG or SVG with a square aspect ratio (e.g. 512×512) works best. Transparency is supported.
What icon sizes are generated?
Standard 16×16 and 32×32 PNG favicons, 180×180 Apple touch icon for iOS devices, and 192×192 / 512×512 PNGs for Progressive Web Apps.
Are my images uploaded to a server?
No — all image resizing and canvas processing happens 100% inside your browser for maximum privacy.