本文へスキップ
JA

画像を変換

ブラウザで HEIC、WebP、JPG、PNG を相互に変換します。無料、登録不要。

  • ファイルは端末の外に出ません
  • 登録不要
  • 無料

As many images as you like · smaller batches finish faster · very large files decode slowly

No images yet. Add files in any of the supported formats.

    Convert to
    Quality

    JPG and WebP only. PNG is always lossless.

    画像を変換する方法

    1. Add your images

      Drop as many files as you like onto the panel — HEIC, WebP, PNG, JPG, or GIF. Files are identified by content, not by name.

    2. Pick the output

      Choose JPG, PNG, or WebP. Animated WebP exports its first frame; HEIC needs a one-time decoder load on some browsers.

    3. Convert

      Everything happens on your device. Same-format files pass through without re-encoding, with metadata stripped.

    4. Download

      Save everything as one zip or file by file. Names keep the original image name with the new extension.

    できること

    • Every direction, one tool

      HEIC from an iPhone, WebP from the web, PNG screenshots, JPG photos — mix them in one batch and pick one output format.

    • No quality lost twice

      A file already in the target format is passed through untouched (JPEG metadata stripped), so nothing gets recompressed twice.

    • Nothing is uploaded

      Decoding and encoding happen in this tab, guarded by a strict content security policy that blocks outbound requests.

    • Honest about surprises

      Animated WebP is labeled "first frame only", and any file that could not really be decoded is reported instead of exported black.

    よくある質問

    How do I convert images for free without uploading them?

    Use this tool. Add as many images as you like, pick JPG, PNG, or WebP, and click Convert. Everything runs in your browser, so there is no upload, no sign-up, and no limit on batches.

    Can it convert HEIC photos from an iPhone?

    Yes. Safari converts with its built-in decoder; Chrome, Edge, and Firefox load a self-hosted decoder the first time a HEIC file is converted. The dedicated HEIC to JPG page covers the common case in one click.

    What happens with animated WebP files?

    The first frame is exported as a still image and the file is labeled "first frame only", so the result never surprises you and never silently exports a black frame.

    Is metadata like GPS location kept?

    No. Re-encoding drops EXIF entirely, and same-format JPEG pass-through strips EXIF, XMP, and IPTC segments without recompressing the image.

    Should I pick JPG, PNG, or WebP?

    JPG for photos and small files, PNG when you need transparency or sharp text, WebP when you want the smallest modern format. All three work everywhere that matters today.

    Does converting reduce quality?

    Only when the format changes — JPG and WebP are compressed formats, so pick High quality for the least change. Files already in the target format are passed through untouched.