utills.
日本語
PNG → ICO converter

PNG to ICO

Convert a PNG to a multi-size ICO in your browser. Your PNG becomes a favicon.ico with 16, 32, and 48 px — plus the rest of a favicon set.

PNG → .icoMulti-size icon100% freeNo sign-up

Faviconを作成する画像をドロップ

ドラッグ&ドロップ、貼り付け、またはファイルを選択

PNG · JPG · WebP · SVG — アイコンはお使いのデバイスで生成

Turn a PNG into a real .ico

The .ico format can hold several sizes in one file, which is exactly what a favicon needs. Drop a PNG here and it is downscaled to 16, 32, and 48 px and packed into a single favicon.ico — the format Windows and older browsers expect.

You also get standalone PNG icons, an apple-touch-icon, Android icons, and a manifest in the same zip, so one PNG gives you everything required to add a favicon to a website. Conversion runs entirely on your device.

How to convert PNG to ICO

  1. Add your PNG — drag & drop, paste, or choose a file (JPG, WebP, and SVG work too).
  2. Set the background — keep transparency or add a solid color if your PNG has fine detail.
  3. Check the previews — confirm the 16 and 32 px versions stay readable.
  4. Download the zip — your favicon.ico is inside, ready to drop at your site root.

Tip: keep PNG transparency

If your PNG has a transparent background, leave it transparent so the icon blends into light and dark browser tabs. Only add a color if thin lines vanish on certain themes.

.ico コンテナ: sizes and where each is used

.ico ファイルは複数のビットマップを 1 つのファイルに収められるアイコンコンテナで、まさにファビコンに必要なものです。あなたの PNG は縮小され、これらのサイズを収めた 1 つの favicon.ico にまとめられます。

Size File Where it's used
16 × 16 px inside favicon.ico 標準の画面密度でのブラウザタブとアドレスバーのアイコン。
32 × 32 px inside favicon.ico 高 DPI ディスプレイでのタブとブックマークのアイコン、および Windows タスクバー。
48 × 48 px inside favicon.ico デスクトップショートカットや Windows タイルが選べる、より大きなエントリ。

Format & container

.ico 内の各サイズはロスレスの PNG エンコードエントリとして保存されるため、コンテナ自体による画質劣化はありません。小さなアイコンの鮮明さを左右するのは元のアートワークのディテールだけです。

How it's wired into your page

                <link rel="icon" href="/favicon.ico" sizes="any">
<!-- favicon.ico はサイトのルートでも自動的に見つかります -->
              

Tip

元データで PNG の透過を保ち、明るいタブと暗いタブのどちらにもアイコンがなじむようにしましょう。細い線がいずれかのテーマで消える場合にのみ、不透明な背景色を追加してください。

すべてのFavicon・アイコンツール

よくある質問

Is the .ico a true multi-size icon?

Yes. The favicon.ico contains 16, 32, and 48 px in one file, so the browser can pick the crispest size for each context.

Can I convert JPG or WebP to ICO instead?

Yes — the converter accepts PNG, JPG, WebP, and SVG. For the sharpest small icon, start from the highest-resolution source you have.

Where does the conversion happen?

In your browser, so the .ico is created on your own device. How any data associated with the tool is handled is described in our privacy policy.

Does converting reduce quality?

Icons are tiny, so downscaling a larger PNG actually improves sharpness. The .ico is lossless; the only thing that affects clarity is how detailed your source art is.

他の画像ツール

Find your next tool

37 tools

Compress image Shrink file size while keeping quality. Resize image Change width and height to any size. Crop image Trim images to the exact frame you want. Convert image Switch between JPG, PNG, WebP and more. Remove background Erase the background in one click. Image to PDF Combine images into one PDF document. Rotate & Flip Turn, straighten, and mirror photos. Image to text Pull editable text out of any image. HEIC to JPG Open iPhone HEIC photos as JPG. Watermark Stamp text or logos over your images. Collage Arrange multiple photos into a grid. Favicon Generator Build favicons in every required size. Color Picker Grab hex colors and build palettes. Blur & Pixelate Obscure faces, plates, and private bits. Enhance Auto-fix brightness, contrast, and color. Passport Photo Prepare photos for ID and passport applications. Signature Clean up and extract handwritten signatures. Photo Effects Apply filters and vintage looks. Social Image Size covers for common social platforms. Add text to image Caption images and make memes fast. GIF Maker Turn frames or clips into animated GIFs. Border & Frame Add clean borders and photo frames. Mockup Drop screenshots into device frames. SVG Converter Trace raster images into scalable SVG. EXIF Viewer Inspect camera and GPS metadata. Poster & Print Lay out posters and print-ready sheets. Document Scanner Deskew and clean photographed documents. Image to Base64 Encode images into a data-URI string. Placeholder Make dummy placeholder images on demand. Image generator Make gradients, patterns, and avatars. Compare Images See two images side by side with a slider. QR Code Create and download QR codes. Hide Text in Image Embed a secret message inside a picture. Length converter Meters, feet, inches, miles and more. Weight converter Switch between kilograms, pounds and more. Temperature converter Celsius, Fahrenheit, Kelvin and more. Data storage converter Bits, bytes, megabytes and gigabytes.
Tab to move · Enter to open · Esc to close