Free Base64 Decoder - Decode Base64 to Text Online
Decode any Base64 string to text in real time. Handles URL-safe input and trims whitespace. Shows clear errors for invalid Base64. No signup. All processing happens in your browser.
Base64 Decoder
Paste a Base64 string to decode.
What is Base64 Decoding and When to Use It
Base64 decoding converts a Base64-encoded string back into its original binary or text form. Use it when you receive Base64 from APIs, JWTs, data URIs, or stored config and need to read the original content.
Our decoder accepts standard Base64 and URL-safe Base64. It trims whitespace and restores missing padding. Invalid input shows a clear error so you can fix typos or extra characters.
Who Uses Base64 Decoder and Common Use Cases
🔧 Developers and API users
Decode JWT payloads, API responses, or config values. Inspect Base64-encoded data during debugging. Verify encoded strings before using them in your app.
📧 Email and data inspection
Decode MIME attachments or embedded content. Inspect Base64 in raw email or logs. Recover text from encoded storage or transfer.
🔍 Security and forensics
Inspect Base64 in URLs, cookies, or headers. Decode obfuscated data. Verify token contents. All decoding happens locally - no data leaves your device.
How to Use the Base64 Decoder Step by Step
1️⃣ Paste your Base64 string
Paste the Base64 string you want to decode into the input area. The decoder accepts standard Base64 and URL-safe Base64. Whitespace is trimmed automatically.
2️⃣ Check for errors
If the string is invalid, you will see an error message. Remove extra spaces, fix typos, or ensure the string is complete. Missing padding is restored automatically.
3️⃣ Copy or download the result
Use the Copy button to paste the decoded text elsewhere. Use Download to save it as a file. The output shows the original text as it was before encoding.
Tips for Base64 Decoding
💡 URL-safe input is supported
JWTs and URLs often use URL-safe Base64 (- and _ instead of + and /). Our decoder handles both. Paste directly without manual conversion.
⚡ Padding is restored automatically
Some APIs omit Base64 padding. We add it back when needed. Just paste the string and decode.
🔒 Decode locally, no uploads
All decoding happens in your browser. Sensitive tokens and data never leave your device. Safe for confidential content.
Why Use Our Base64 Decoder
🚀 Real-time decoding
See the decoded text as you paste. No submit button. Clear error messages for invalid input.
🔒 Private and secure
Your data never leaves your device. All decoding happens in your browser. No server uploads or storage.
🌐 URL-safe and forgiving
Accepts URL-safe Base64. Trims whitespace. Restores padding. Free, no signup, no limits.
Base64 Decoder: Free, Fast and Ready to Use
Our Base64 decoder is free, requires no account, and works on all devices. Your data stays private. Decode JWTs, API responses, or any Base64 string. No setup, no hassle.
Try it now. Paste your Base64 string and get instant decoded text. Copy or download the result. Works with standard and URL-safe Base64.
Frequently Asked Questions about Base64 Decoder
Is the Base64 decoder free?
Yes. The Base64 decoder is completely free. No signup, no limits, no paid features.
What if I get 'Invalid Base64'?
Check for typos, extra spaces, or incomplete strings. Ensure you pasted the full Base64. Remove any non-Base64 characters. URL-safe input (- and _) is supported.
Does it support URL-safe Base64?
Yes. We accept both standard Base64 (+ and /) and URL-safe Base64 (- and _). Paste JWT payloads or URL-encoded strings directly.
Is my data sent to a server?
No. All decoding happens in your browser. Your Base64 string never leaves your device. Nothing is stored or transmitted.
Can I decode images?
This tool decodes Base64 to text. For Base64-encoded images, the decoded output will be binary data. Use an image-specific tool to view the image, or decode to verify the string.
How do I encode text to Base64?
Use our Base64 encoder tool. Paste your text and get the Base64 string. Both encoder and decoder work in your browser with no server uploads.