Base64 Encoder & Decoder
Encode and decode Base64.
El resultado aparecerá aquí…Arrastra tu archivo o haz click — Cualquier formato hasta 10 MB
Máx 10 MB por archivo
What is Base64 and how do you encode it locally?
Base64 is a scheme that represents binary data as plain ASCII text using 64 safe characters, built for channels that only accept text: HTTP headers, JSON, XML, or the body of an email. Docuboxer's Base64 tool encodes and decodes 100% locally, in your own browser — whatever you paste is never sent to any server. That distinction matters when you handle credentials, tokens or production payloads: material you should never paste into tools that process it in their cloud. The result appears in real time as you type, handles accented and international characters correctly (UTF-8), and keeps working offline once the page has loaded. One thing worth knowing up front: Base64 is not encryption. Anyone can decode it in a second, so it is a way to transport data through text-only channels — never a way to protect it.
How to use Base64 Encoder & Decoder
- Pick the mode: encode plain text to Base64, or decode an existing Base64 string.
- Paste or type the content into the input panel for the mode you chose.
- The result appears automatically in the output panel, with a one-click button to copy it to the clipboard.
Common use cases
Inline images in HTML and CSS
Encode small assets to Base64 to embed them as data URIs directly in your HTML or CSS, cutting HTTP requests and speeding up initial page load.
Build HTTP Basic Auth credentials
Generate the Base64 string required for Basic Auth authorization headers when testing APIs or configuring backend services — without the credentials leaving your machine.
Debug tokens and API payloads
Decode Base64 values found in API responses, cookies, webhooks and queue messages to inspect their real content during development and debugging.
Embed binary data in JSON and XML
Convert content to Base64 to carry it inside JSON documents, XML or environment variables that only accept text — the same trick Kubernetes secrets and API attachments use.
Inspect encoded email content
Email bodies and attachments travel Base64-encoded (the MIME standard). Decode those blocks to see the original content without desktop tooling.
Frequently asked questions
How do I encode text to Base64 without uploading it anywhere?
With this tool the process is literally local: type or paste the text and your own browser produces the Base64 string instantly, with nothing traveling to a server. You can verify it yourself — disconnect from the internet after the page loads and it keeps working.
How do I decode a Base64 string?
Switch to decode mode, paste the Base64 string, and the original text appears in the output panel in real time. If the string is incomplete or contains invalid characters, the tool tells you instead of returning corrupted output.
Is Base64 encryption?
No. Base64 is an encoding scheme, not encryption: anyone can decode it trivially. Its purpose is representing binary data as ASCII text so it can travel through text-only protocols. If you need to protect information, use real encryption on top of the encoding.
How much bigger does Base64 make my data?
Base64 encoding grows the original by roughly 33%: every 3 input bytes become 4 output characters. Keep that in mind before embedding large files as data URIs.
Why do accented or non-English characters decode wrong in other tools?
Because many older implementations encode byte by byte assuming ASCII, which mangles multibyte characters. This tool encodes and decodes in UTF-8, so accents, emojis and any international character survive the round trip intact.
Is it safe to paste tokens or credentials here?
Yes — and it's exactly the use case where choosing the right tool matters: here the content is processed only in your browser's memory, with no requests to any server, no logs and no retention. Close the tab and no trace of what you pasted remains.