Instant Share Online Notepad (Images Supported) Image support

Online notepad for instant cross-device sharing. Supports high-resolution images and browser-side AES-GCM encryption. See below for details.

Security Measures of this tool

No login required. Text and images are encrypted in your browser before upload. Share with a 3-character code and password.

Tool interface

Text limit is 100,000 characters
Up to 10 images can be saved
Automatically deleted after 7 days

If you have a share code

0 / 100,000

Click to select images, or drag & drop

Supports JPEG, PNG, GIF

Data is encrypted in the browser before transmission. Without this password, no one (including admins) can decrypt it.

オンラインメモ帳の使い方

このツールの特徴

ブラウザで即座に使えるオンラインメモ帳です。アプリのインストールやアカウント登録は不要です。
テキストと画像（最大10枚）をクラウドに保存し、3文字の共有コードとパスワードで他のデバイスから読み込めます。保存前の下書きはブラウザ内に保持されます。

活用シーン

PCからスマホへ転送

スクショや長文テキストを保存し、共有コードとパスワードをスマホに伝えるだけで読み込めます。

一時的なチーム共有

会議メモや設定手順を、ログイン不要で素早く共有できます。7日後に自動削除されます。

画像付きメモ

スクリーンショットや写真と一緒にテキストを保存し、視覚的な情報を含めた記録が可能です。

共有コードでの読み込み

保存後に表示される3文字のコードとパスワードを使って読み込みます。データはブラウザ内で暗号化されてから送信されます。

FAQ

It's made by an individual — that feels scary.

You can verify it yourself. Press F12 in your browser and open the Network tab to inspect actual requests. You'll see only encrypted memo content there. You can likewise confirm that plaintext memo content is never sent externally.

It's on a free tier, right? That worries me.

You can still view existing memos even when free-tier limits are reached — only new saves are blocked.

To prevent that as much as possible, when Cloudflare's free tier is reached, storage automatically switches to Backblaze B2 (a Cloudflare partner). B2 is also optimized so memo performance does not degrade. We're still exploring solutions if B2 limits are reached.

Operators receive alert emails when storage switches or limits approach, and we respond quickly with billing upgrades or data cleanup, so extended outages are unlikely.

Within free-tier constraints, user safety and convenience remain our top priority. Thank you for your understanding.

How many images can I save?

Up to 10 images per memo. Images are resized and compressed in the browser before upload.

Are images compressed?

Yes. Long edge is capped at 2560px. JPEG/WebP at ~80% quality, PNG at ~96% before upload.

How long is data stored?

Automatically deleted 7 days after saving. For temporary notes and sharing only.

Is password protection secure?

Yes. Data is AES-GCM encrypted in the browser before upload. Even the server admin cannot read it without the password.

Can anyone read it with the share code?

Only with both the 3-character share code and the password. Data is always encrypted; without the password it cannot be decrypted.

Can I update (overwrite) a saved memo?

No. Saving again creates a new share code. Overwrite is not supported.

Do I need an account?

No. Anyone can create a memo and get a share code immediately.

What is the character limit?

About 100,000 characters per memo.

Can I browse other people's memos?

No list or search. You cannot access others' memos without their share code and password.

Is Instant Share Online Notepad (Images Supported) free?

Free to use, no sign-up required.

Is data sent to a server?

Drafts stay in your browser until you click Encrypt and Save to Cloud. When saved, data is sent to the server and is always AES-GCM encrypted — without the password, even the server admin cannot read the content.

Supported browsers?

Tested on recent Chrome, Edge, Firefox, and Safari.

Offline use?

Core features work offline after the first load.

When to use it?

Use it when: When you want to send a PC screenshot and memo to your phone, create a temporary shared note, or store encrypted text.

Usage example?

Example: Sharing meeting notes with whiteboard photos, setup instructions, temporary text transfer to phone

Main features?

Up to 100,000 characters and 10 images, Browser-side AES-GCM encryption, No login or account required, 7-day temporary storage