背景除去ツール

Drop in a JPG, PNG, WebP, or HEIC and get a transparent PNG cutout at the source resolution — no megapixel cap, no signup gate, no watermark, no per-image credit. Your full-resolution file never leaves your device, and nothing is stored.

今すぐ試す - 無料

背景除去ツールの特徴

AI自動検出

高度な機能1により、優れた結果を実現

高精度な切り抜き

高度な機能2により、優れた結果を実現

エッジの自然な処理

Your full-resolution original never leaves your device: a small working copy is sent to compute the cutout, your browser then applies the returned mask to the original pixels locally, and nothing is retained once the result comes back. By contrast, remove.bg, Canva BG Remover, Photoroom web, and Adobe Express all push the source file itself to their servers. If you would rather nothing left your device at all, the private mode at /private-background-remover/ processes everything locally.

背景除去の方法

画像をアップロード

背景を除去したい画像を選択

自動処理

AIが自動で背景を検出・除去

ダウンロード

背景なしの画像を保存

背景除去の活用例

プロフィール写真

SNSやビジネス用の写真編集

製品カタログ

統一感のある商品画像作成

マーケティング素材

広告やバナー用の画像準備

ID写真

各種証明写真の背景処理

背景除去ツール - 画像の背景を無料で削除

AI技術で画像の背景を自動的に削除。簡単・高速・高精度な背景除去。

The other axis where this tool differs from the paid alternatives is what actually leaves your device, and what anyone keeps afterwards. remove.bg, Canva BG Remover, Photoroom web, and Adobe Express all take the source file itself — your original bytes leave your browser, land on their servers, and are retained under their terms. Here, your full-resolution original never leaves your device: a small working copy is sent to compute the cutout, your browser then applies the returned mask to the original pixels locally, and nothing is kept on our side once the result comes back. There is no account, no gallery, and no retained copy for you to go back and delete later. For pre-launch product shots under NDA, unreleased brand assets, personal photos you would rather not hand to a third party, or anything covered by GDPR / HIPAA / SOC 2 boundaries where retention and data residency are the questions actually being asked, that distinction is the one that matters: the full-resolution asset stays with you, and nothing persists with us. If your requirement is stricter still and nothing at all may leave the device, /private-background-remover/ offers a private mode that does the whole job locally, with the trade-offs stated up front — it is slower, it is capped to smaller files, and the quality ceiling is lower. Either way there is no signup and no paid tier gating the result.

backgroundRemoverの効果的な活用法

Working backwards from where the cutout lands: a Shopify product gallery wants 2048×2048 PNG, an Etsy listing wants a transparent PNG, an Amazon main image wants pure white RGB 255/255/255 at 85% frame fill, a LinkedIn headshot wants a brand-coloured backdrop at 400×400, a passport photo wants pure white at 600×600. None of those workflows tolerate a 0.25 megapixel preview — they need full-resolution source material because they crop, re-size, and re-encode multiple times before the asset ships. They also can't tolerate non-commercial-use licensing because every one of those destinations is a commercial transaction. The cutout pipeline here delivers full-resolution PNG-24 with an 8-bit alpha channel and an explicit commercial-use license (documented at /commercial-use-background-remover/), which is the source-of-truth asset every downstream marketplace, CMS, and ad-creative pipeline expects. The privacy posture (full-resolution originals never leave your device, nothing stored — and a private mode at /private-background-remover/ that keeps everything local) means the asset library you're building doesn't leak to a third-party SaaS in the process. For a side-by-side comparison against remove.bg's free and paid tiers, see /vs/remove-bg/. Last verified 2026-05-09.

よくある質問

どんな画像形式に対応していますか？

JPG、PNG、WebPなど主要な画像形式に対応しています。

髪の毛なども綺麗に切り抜けますか？

はい、AI技術により髪の毛などの細かい部分も自然に処理されます。

処理時間はどれくらいですか？

切り抜きを計算するために、写真の小さな作業用コピーが当社のサーバーへ送信されます。フル解像度の元画像はお使いのデバイスに残り、返ってきた結果はブラウザ側で元のピクセルに適用されます。切り抜きが返ってきた時点で、当社側には何も残りません — アカウントも、ギャラリーも、後から削除しに戻る必要のある履歴もありません。クラウド専用のツールは逆の仕組みです。remove.bg、Canva BG Remover、Photoroom web、Adobe Express はいずれも元ファイルそのものを預かり、各社の規約に基づいて保持します。それよりも要件が厳しく、一切デバイスの外に出せない場合は、/private-background-remover/ のプライベートモードがすべての処理をお使いのデバイス上で完結させます。トレードオフは先にお伝えします:処理は遅く、品質の上限は低く、画像は 25 MB 未満である必要があります。未発表のブランド素材、NDA 対象の仕事、第三者に渡したくない個人的な写真、あるいは「保存されるかどうか」こそが本当の論点である場合には、この違いが効いてきます。

How well does it handle hair, fur, and translucent edges?

Hair and fur hold up here about as well as they do in the paid tools — remove.bg, Photoroom, Canva, and Adobe Express included — and the cutout is typically clean enough that no manual cleanup is needed on portraits, product shots, and pet photos with reasonable lighting. The honest exceptions: very fine flyaway hair against a similarly-coloured backdrop (blonde hair on a beige wall, dark hair on a black backdrop), translucent material like glass and smoke, motion-blurred edges, and low-resolution sources where the original simply doesn't carry enough detail to draw a clean edge. For those cases the in-editor brush and erase tools let you refine the cutout by hand in the same view, which usually closes the gap on the hardest 5%. If even that's not enough — see q5.

When is paid software like Photoshop the better pick?

Honest concession: if you're working on hero ad creative, magazine-cover-quality compositing, or any cutout where the last 1% of edge precision is the deliverable rather than a nice-to-have, Photoshop's Select-and-Mask workspace plus a Wacom pen still beats every browser tool. The combination of channel-based selections, frequency separation for skin retouch, the Refine Edge brush with its dedicated decontaminate-colours pass, and the ability to paint partial-alpha values pixel-by-pixel is genuinely better for surgical work. The cost is the $22.99 per month Adobe Photography plan plus the 20–40 minutes per image of skilled manual labour. The trade-off is workload-dependent: for the 200 product photos a marketplace seller ships every Friday, the free 3-second cutout here wins by 199 images; for the one hero shot of the season's flagship product, Photoshop wins by a mile. For most ecommerce, social, and headshot work the free pipeline here is genuinely good enough — but knowing where the ceiling is matters for honest tool selection.

背景を今すぐ除去

Free, full-resolution output at the source megapixel count, commercial use included by default, and your full-resolution photo never leaves your device. Last verified 2026-05-09.

ツールを使い始める

Quick reference: 背景除去ツール

Tool URL: remove-bg.io/ja-JP/background-remover/
Free: yes — no signup, no watermark
Best for: プロフィール写真
Last updated: 2026-08-18