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The new device activates and the old device signs out. Your license key stays the same — you just move it between devices as needed. No limit on how often you switch.

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DevFree

Encode / Decode Base64

Convert text or files to and from Base64.

By Daniel BeglaryanUpdated August 2026

PrivateWorks OfflineNo Account

URL-safe

Input

0 characters

Output

0 characters

Deep dive

About Encode / Decode Base64.

Encode and Decode Base64 — Text and Files

Paste text to encode/decode, or drop a file to convert it to a base64 data URI. CipherForces Base64 Encoder handles both text (UTF-8) and binary (files) accurately, with URL-safe base64 variant support.

Common Use Cases

Email MIME parsing: Decode a base64-encoded email attachment or body.
API debugging: Decode base64 payloads in JWT tokens, API responses, or headers.
Data URIs: Embed an image as a base64 data URI directly in HTML or CSS.
SSH config: Decode base64-encoded keys and config files.

Key Features

Two-way conversion: Text↔base64 and file↔base64.
URL-safe variant: Toggle between standard and URL-safe base64 (used by JWTs).
Data URI output: Automatically wraps with data:image/png;base64, or the correct MIME type.
Large file support: Handles multi-MB files without hanging.

Privacy: Encoding/decoding uses native browser APIs. Your text and files never upload.

FAQ

Frequently asked questions.

How do I encode text to Base64 with this tool?

Paste your text into the input box and the Base64 output appears instantly. To go the other way, paste a Base64 string and switch to decode mode to recover the original text. You can also drop in a file to convert it to Base64. Copy the result with one click.

Is my data uploaded to a server when I use this Base64 encoder?

No. This tool runs entirely in your browser using JavaScript, so your text and files are never sent to any server. The conversion happens on your own device, nothing is stored or transmitted, and there is no signup. Your data stays private even with sensitive content like keys or tokens.

Can I convert files to Base64, not just text?

Yes. Besides plain text, you can convert files such as images, PDFs, or other documents into a Base64 string, which is useful for embedding data inline. Because everything processes locally in your browser, even large files stay on your machine and are never uploaded anywhere.

Why would I need to encode something in Base64?

Base64 turns binary or text data into a safe ASCII string so it can travel through systems that only handle text, like JSON, email, or HTML data URIs. Developers use it to embed images in code, pass tokens, or store binary content in text-only fields without corruption.

Three steps