Encode text, decode Base64 strings, or turn files into data URLs — all in your browser. Nothing gets uploaded anywhere.

Input
Empty
Click to Upload Image

PNG, JPG, WebP, SVG supported.

Output

Paste Base64 or plain text on the left to see the result here.

Analysis
0 B
Input Size
0 B
Output Size
0
Characters
0
Lines
Mode Encode
Status Empty
Detected Type None

What you can do with this tool

No sign-up, no uploads, no nonsense. Just Base64 encoding and decoding that works.

Text to Base64

Paste any text and get the encoded output instantly.

File Upload

Drop a file to get its Base64 data URL with correct MIME type.

Image Preview

Decoding an image? You'll see a live preview right here.

Fully Offline

Everything happens in your browser. Zero server calls.

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Technical Use Cases

Decoding Base64 is an everyday task for developers debugging API responses, inspecting JWT tokens, or extracting embedded data.

If you receive an encrypted-looking string ending in = or ==, it's likely Base64 encoded. Decoding it allows you to read the original JSON, XML, or plain text.

This is critical for troubleshooting Basic Auth headers, inspecting email payloads (MIME), or reading data exported from legacy systems.

How to Use

  1. Paste your Base64 encoded string into the input area on the left.

  2. The tool is pre-set to "Decode" mode for your convenience.

  3. The original, human-readable plain text string will instantly appear in the output area.

  4. If the decoded string is actually a file, the tool will provide a download option.

About this tool

Everything runs securely in your browser. Your text, files, and encoded output never hit a server — there's no backend processing involved at all. This makes it safe to use with API keys, tokens, certificates, or any other sensitive data you'd rather not paste into a random website.

Frequently Asked Questions

How do I know if a string is Base64?

Base64 strings typically consist of letters (A-Z, a-z), numbers (0-9), plus (+), and slash (/). They often end with one or two equals signs (=) as padding.

Is it safe to decode tokens here?

Yes! The decoding process is 100% client-side. Your string never leaves your browser, making it completely safe for sensitive tokens.

Why did my decoded string look like gibberish?

If the output looks like random symbols, the original data was likely a binary file (like an image or PDF) rather than a readable text string.