Google DocsとSlidesで画像を圧縮
ドキュメントを離れずに画像サイズを最大80%削減。ワンクリックでスキャン、品質を選択、すべての画像を圧縮。
なぜMiCompress Add-onを使う？
Google Docsで動作
ドキュメント内のすべてのインライン画像をスキャンして圧縮。
Google Slidesで動作
すべてのスライドの画像を圧縮。位置、サイズ、回転を維持。
3つの圧縮モード
ロスレス、おすすめ、最大圧縮から選択。
安全・プライベート
画像は安全に処理され、圧縮後すぐに削除されます。
スマートリサイズ
任意で最大幅を設定すれば、圧縮と同時に大きすぎる画像を自動で縮小できます。スマートフォンやカメラから貼り付けた写真の軽量化に最適です。
ワンクリックの一括処理
ドキュメントやプレゼンテーション内のすべての画像を、たった1クリックで圧縮。画像を1枚ずつ処理する必要はなく、手作業の時間を大幅に節約できます。
使い方
Add-onをインストール
下のステップごとのガイドに従って MiCompress を Google アカウントに追加し、アクセスを許可します。所要時間は約 10 分です。
サイドパネルを開く
Google DocsかSlidesでMiCompressパネルが表示されます。「画像をスキャン」をクリック。
圧縮して保存
圧縮レベルを選んで「すべて圧縮」をクリック。
対応フォーマット
Max file size: 25MB per image
圧縮レベルを選択
ロスレス
最高品質。目に見える違いなし。通常10〜30%節約。
おすすめ
バランスが良い。画質の劣化は最小限。通常40〜60%節約。
エクストリーム
最小のファイルサイズ。多少の画質トレードオフあり。60〜80%以上節約。
よくある質問
Add-onは無料ですか？
圧縮で画質は落ちますか？
データは安全ですか？
最大画像サイズは？
圧縮時にリサイズできますか？
Google スプレッドシートでも使えますか？
複数のドキュメント内の画像を一度に圧縮できますか？
ドキュメントの書式やレイアウトに影響しますか？
アドオンはオフラインでも使えますか？
How to install
MiCompress runs from an Apps Script project in your own Google account. Follow the steps below to set it up — it takes about 10 minutes, and you can remove it at any time.
What you need
- A Google account (Gmail or Google Workspace)
- A free MiCompress account, for your API key
- About 10 minutes, on a computer (not the mobile apps)
Manual install, step by step
-
1
Get your API key
Create a free MiCompress account (or sign in), open My account and press Copy key under API Access. The key starts with
mc_. A free account includes 50 images a month — enough to try it; see plans for more. -
2
Create an Apps Script project
Go to script.google.com → New project. Click Untitled project at the top and rename it MiCompress.
-
3
Show the manifest file
Click the gear icon (Project Settings) in the left bar and tick Show "appsscript.json" manifest file in editor. Go back to the Editor (the
<>icon). -
4
Paste in the five files
Use the Copy buttons below. For
Code.gsandappsscript.json, select everything already in the file and paste over it. For the other three, click + next to Files → Script and type the name without ".gs" (Apps Script adds it):CardBuilder,DocsHandler,SlidesHandler. Press Ctrl+S (⌘S on Mac) to save. -
5
Add your API key
Back in Project Settings, scroll to Script Properties → Add script property. Property:
ADDON_API_KEY, value: yourmc_…key. Click Save script properties. -
6
Link a Google Cloud project
Google requires add-ons to run under a standard Cloud project. In Google Cloud Console create a project (free, no billing needed). Open Google Auth Platform (OAuth consent screen) → Get started: any app name, your email, audience External (or Internal on a company Workspace). Under Audience → Test users, add your own Google address. Copy the Project number from the project's dashboard, then in Apps Script → Project Settings → Google Cloud Platform (GCP) Project → Change project, paste it and confirm. You do not need to enable any APIs.
-
7
Install the test deployment
Click Deploy → Test deployments. Next to Application(s) make sure Google Docs and Google Slides are listed, click Install, then Done.
-
8
Open a document and authorize
Open (or reload) any Google Doc or Slides deck. The MiCompress icon appears in the right-hand side panel — click it, then Authorize access. Because this copy belongs to you and is not verified by Google, you will see "Google hasn't verified this app": click Advanced → Go to MiCompress (unsafe) → Allow. It is your own script; the only data it sends out is each image, to the MiCompress API.
Troubleshooting
"Invalid API key"
"ADDON_API_KEY not set"
"Free API allowance used" / "Monthly limit reached"
The MiCompress icon does not appear
"This app is blocked" or "Access denied"
Can my team use it?
Or just use it now, without installing anything
The website compresses the same images with the same engine. Export from Docs or Slides, compress, and drop the result back in.
Compress images nowAPI key plans
Your API key is included with every MiCompress account and works in this add-on, the micompress command-line tools (npm, PyPI, Homebrew, …) and the HTTP API. The plan decides how much it can compress each month.
Free account
- Personal API key
- Workspace add-on, CLI & API
- Files up to 100MB
- Try before you buy
API
- Same personal key, 10× the free limit
- Workspace add-on, CLI & API
- Separate from your website usage
- Cancel anytime
Plus
- Same key, higher limit
- Priority processing queue
- No ads on the website
- Files up to 500MB on the website
Pro
- Everything in Plus
- Fastest queue priority
- Up to 100 files per batch
- Files up to 2GB on the website
One file = one compression. In the add-on, images that cannot be made smaller are left untouched and not counted. The API plan only raises your key's allowance; Plus and Pro share their monthly quota between the website and the API.
Cancel anytime from My account. Need more than 5,000 a month or a team key? Contact us
