Base64

プレーンテキストとBase64の間で迅速に変換します。

Unicode セーフ

エンコード/デコード

コピー結果

ツールを読み込み中...

このツールのワークスペースと設定パネルを準備しています。

What this page is good for

This page is helpful when text has to move through systems that expect Base64 rather than raw readable content.

It is best treated as a quick encoding and inspection tool, especially during API debugging, configuration checks, or small data handoffs.

Good fit use cases

Encode a token, snippet, or payload before testing an API or header flow.
Decode an incoming Base64 value to see what data is really inside it.
Check whether a copied string is valid Base64 before deeper debugging.

A practical way to use it

Paste the exact source text or encoded value so you inspect the real payload rather than an edited sample.
Run the encode or decode step that matches your direction of travel and review the output carefully.
Reuse the result only after confirming the target system expects Base64 and not another transport format.

Practical notes

Base64 changes representation, not the underlying meaning or secrecy of the data.

If the content includes credentials or private payloads, treat the browser environment with the same caution you would use anywhere else.

Common questions

Is Base64 best for quick tasks or heavy workflows?

It is strongest for fast, focused browser tasks. If you need collaboration, automation, or long-term records, export the result and continue inside your primary workflow.

Do I need an account before using it?

The public utility flow is designed around immediate use, so basic tasks should be possible without sign-up.

When should I switch to テキストMD5 instead?

テキストMD5 is a better fit for the adjacent step around this task. Finishing one focused step at a time is often more dependable than overloading a single page with too many actions.