Base64 Tools

Base64 Encoder & Decoder — Text & File

Fast, reliable Base64 utilities for everyday development. Encode plain text or files to Base64, decode Base64 back to text or binary, handle URL-safe variants, optional padding, and line wrapping. Works entirely in your browser for privacy.

What you can do

• Text ⇄ Base64: Convert UTF-8 text to Base64 and back.
• File → Base64: Turn any file into a Base64 string for embedding or transport.
• Base64 → File: Decode to binary; optionally treat output as PNG or JPG for quick preview.
• URL-safe: Switch between standard and URL-safe forms (+// ↔ -/_).
• Padding & Wrap: Keep/remove = padding and wrap lines at a fixed column (e.g. 64).
• Data URL: Paste full data:*;base64, strings—the tool extracts the payload automatically.
• Local processing: Everything runs client-side; no uploads, no servers.

How to use

1. Text Encode: Paste text → choose URL-safe/padding/wrap → Run → copy or download .b64.txt.
2. Text Decode: Paste Base64 (or a data URL) → optionally ignore whitespace / URL-safe input → Run.
3. File Encode: Select a file → adjust options → Run → get Base64 string.
4. File Decode: Paste Base64 or drop a text file → (optional) “I believe this is an image” and pick PNG/JPG → preview or download.

Tips & troubleshooting

• Invalid characters: Enable “Input may be URL-safe” when decoding strings that use - and _.
• Missing padding: Some Base64 omits =. The decoder auto-repairs padding, but you can force keep/remove on encode.
• Whitespace: Enable “Ignore whitespace” to accept wrapped or spaced Base64.
• Data URLs: The tool strips the header (e.g. data:image/png;base64,) for you—paste as is.
• Binary output appears garbled: That’s expected in the text box; use Download to save the decoded binary.
• Large inputs: Browser memory limits apply. For very large files, prefer chunking outside the browser.

FAQ

What is Base64? A binary-to-text encoding that represents bytes using 64 ASCII characters. Common in HTTP, MIME, JWT, and embedding assets.

What is URL-safe Base64? A variant replacing + → - and / → _; padding may be omitted.

Do I need padding? Many parsers accept unpadded strings; some standards still require it. Toggle as needed.

Is processing private? Yes. All work happens locally in your browser; no data is sent anywhere.

Use cases

• Embed small images or fonts as Base64 in CSS/HTML.
• Move binary blobs through systems that only allow text.
• Quickly inspect or repair Base64 from logs and APIs.

Examples