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Convert WebP to JPEG (WebP to JPEG)

Convert WebP to JPEG online. Drop a WebP and get a JPEG back at roughly 112% of the original byte cost. No sign-up, nothing saved.

  • Plays in every email client
  • No account required
  • Nothing saved
The same image as WebP at 329 KB and JPEG at 367 KB, the JPEG is larger but compatible everywhere.The same image as WebP at 329 KB and JPEG at 367 KB, the JPEG is larger but compatible everywhere.

ドラッグで比較、ビフォー / アフター

概要

Convert WebP to JPEG. This tool re-encodes a WebP into a JPEG so the image plays in environments that still cannot read WebP. The output is larger (roughly 112% of WebP byte cost in reverse), and that is the point: you are trading size for reach. One image per request, nothing saved.

JPEG (JPEG) was standardised in 1992 and is supported in essentially every image-aware environment: every browser, every email client, every CMS importer, every mobile OS photo picker, every print workflow, every legacy Android WebView. When a pipeline rejects WebP, JPEG is almost always the safe fallback that gets through without a renegotiation.

WebP (WebP) is the more modern codec on the pair. It compresses better than JPEG by design, so a conversion in this direction is a deliberate downgrade. The reason to do it is never aesthetic. It is compatibility: the downstream viewer (an email client, an old CMS, a vendor portal, an ancient imaging workflow) still refuses WebP and you have no route to fix it on their side.

The trade-off is a known size penalty: JPEG at visual parity is materially larger than WebP, often 112% or more against WebP. In exchange you get a file that opens anywhere. Visual quality at the default target is indistinguishable from the WebP for photographic content; flat-colour regions compress slightly worse in JPEG, and fine-detail gradients may show modest perceptual softening at very aggressive quality settings.

When NOT to convert WebP to JPEG: when the delivery target actually supports WebP (roughly 100%% of modern browsers do), because shipping JPEG wastes bandwidth for no user benefit. When you need pixel-exact archival retention (use PNG or the original WebP). When the source is a screenshot, dense text, or a UI mock: JPEG degrades sharp edges more than WebP does.

Your upload is held only while we transcode it. The resulting JPEG comes back on a one-time download link and is deleted the moment you fetch it. Nothing about the WebP you uploaded is saved, indexed, or used for training. Converting WebP to JPEG on BouseMutton is a quiet one-shot operation that leaves no state behind on our servers.

ひと目で分かる

WebP to JPEG at a glance

決める前に知っておきたい数字とトレードオフ。

  • JPEG vs WebP size penalty

    At visual parity, JPEG typically needs materially more bytes than WebP. Treat the size penalty as the price of reach, not a bug.

  • Universal support

    JPEG plays in every browser, every email client, every CMS, and every print workflow. It is the safe fallback when WebP is rejected.

  • Year standardised

    JPEG dates from 1992. Its age is exactly why legacy environments accept it without issue.

  • Visual quality parity

    At the default target, the JPEG is visually indistinguishable from the source WebP on photographic content at normal viewing distance.

  • Metadata passthrough

    EXIF and ICC colour-profile metadata are preserved through the conversion. Run the EXIF strip tool separately if you need to remove them before publishing.

  • Edge cases to watch

    Screenshots, UI mocks, and dense-text images degrade harder in JPEG than in WebP. Reach for PNG instead of JPEG for those sources.

  • When not to convert

    If the delivery target already accepts WebP (about 100%% of browsers), ship the WebP and save the bytes.

ワークフロー

使い方

3 ステップ、通常 5 秒以内に完了。

  1. 1

    Upload a WebP

    Drop a WebP up to 25 MB, or paste from the clipboard. No sign-up, no credit card, no account.

  2. 2

    We re-encode it as JPEG

    We transcode your WebP to JPEG at a default quality that matches the source visually for photographic content. Metadata is preserved unless you strip it separately.

  3. 3

    Download your JPEG

    Your JPEG comes back on a one-time download link that plays in every email client, CMS, and legacy viewer. The file is deleted once you fetch it.

サンプル

実際の動作を見る

各スライダーをドラッグして、ビフォーとアフターをピクセル単位で比べてみてください。

A 328 KB WebP converts to a 360 KB JPEG that plays in every legacy email client.A 328 KB WebP converts to a 360 KB JPEG that plays in every legacy email client.
A 328 KB WebP converts to a 360 KB JPEG that plays in every legacy email client.
A product photograph at 126% of the source weight keeps its colour fidelity: the JPEG looks identical to the source WebP.A product photograph at 126% of the source weight keeps its colour fidelity: the JPEG looks identical to the source WebP.
A product photograph at 126% of the source weight keeps its colour fidelity: the JPEG looks identical to the source WebP.
A travel snapshot (71 KB WebP to 152 KB JPEG) with preserved EXIF and ICC colour profile, ready to drop into a CMS that still refuses WebP.A travel snapshot (71 KB WebP to 152 KB JPEG) with preserved EXIF and ICC colour profile, ready to drop into a CMS that still refuses WebP.
A travel snapshot (71 KB WebP to 152 KB JPEG) with preserved EXIF and ICC colour profile, ready to drop into a CMS that still refuses WebP.
プライバシー

画像は使い終わったら消えます

ブラウザ内で動作

Your upload is held only while we transcode it. The resulting JPEG comes back on a one-time download link and is deleted the moment you fetch it. Nothing about the WebP you uploaded is saved, indexed, or used for training. Converting WebP to JPEG on BouseMutton is a quiet one-shot operation that leaves no state behind on our servers.

  • 数秒で処理
  • データ保存なし
  • アカウント紐付けなし
今すぐ試す

画像をアップロード

ワンクリック。サインアップ不要。あとはこちらにお任せ。

画像形式を変換

画像をここにドロップするか、クリックしてアップロード
ドラッグ&ドロップ、ファイルを参照、または Cmd+V でクリップボードから貼り付け
0 = もっとも小さく / 低画質、100 = もっとも高画質
ヒント
Cmd+V を押すと、クリップボードから画像を直接貼り付けられます。

複数の画像を処理する必要がありますか?

無料の Convert WebP to JPEG (WebP to JPEG) は 1 枚ずつ処理します。クレジットパックなら 1 バッチで最大 50 枚、単一の ZIP ダウンロード、3 種類のプリセット (Blog / Social / Ecom) が使えます。 100 クレジット €5 から。一度払えば失効しません。

クレジットパックを見る
用語集

Glossary for WebP and JPEG

上記の専門用語のやさしい説明。

FAQ

よくある質問

新しいツールを試す前にもっとも多く寄せられる質問への回答。

関連の読みもの

Related reading on WebP, JPEG, and compatibility fallbacks

このツールと相性のよい他のツール。

  • Browse all format convertersSee the full set of WebP and JPEG tools on BouseMutton, including compression, EXIF stripping, and resize.
  • WebP -> AV1 Image File FormatAlso converting WebP to AV1 Image File Format? This tool handles the same source in a different target format, for cases where the codec choice differs.
  • Portable Network Graphics -> JPEGRun Portable Network Graphics through this tool before or after conversion to JPEG, depending on the workflow step you are at.
  • Compress imageShrink an already-converted image further without changing its format, for bandwidth-constrained pages.

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次のように引用してください

BouseMutton (2026). Convert WebP to JPEG online [Web application]. https://bousemutton.com/ja/convert-webp-to-jpg

最終更新: 2026-04-24