This example demonstrates how to convert an input string to a base64-encoded value and back to ASCII text strings.

Other variations, usually derived from Base64, share this property but differ in the symbols chosen for the last two values; an example is the URL and filename safe "RFC 4648 / Base64URL" variant, which uses "-" and "_".

July 30, 2026 - When comparing the original data ... data, Base64 encoding increases the size by 33% plus about 4% additional if inserting line breaks for typical line length. The earliest uses of this encoding were for dial-up communication between systems running the same operating system – for example, uuencode ...

<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAAApgAAAKYB3X3/OAAAABl0RVh0U29mdHdhcmUAd3d3Lmlua3NjYXBlLm9yZ5vuPBoAAANCSURBVEiJtZZPbBtFFMZ/M7ubXdtdb1xSFyeilBapySVU8h8OoFaooFSqiihIVIpQBKci6KEg9Q6H9kovIHoCIVQJJCKE1ENFjnAgcaSGC6rEnx...

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIAQMAAAD+wSzIAAAABlBMVEX///+/v7+jQ3Y5AAAADklEQVQI12P4AIX8EAgALgAD/aNpbtEAAAAASUVORK5CYII

Generate an image · Or paste a base64 image · Result · Source Code

Note: Base64 is a binary encoding rather than a text encoding, but btoa and atob were added to the web platform before it supported binary data types. As a result, the two functions use strings to represent binary data, with the code point of each character representing the value of each byte. This has led to a common misconception that btoa can be used to encode arbitrary text data — for example, creating a Base64 data: URL of a text or HTML document.

November 20, 2025 - Base64 uses 6-bit characters grouped into 24-bit sequences. For example, consider the sentence Hi\n, where the \n represents a newline. The first step in the encoding process is to obtain the binary representation of each ASCII character.

August 4, 2011 - Big thanks to Nick Stephens for donating this sample code to do the not-so-simple algorithm for base 64 encoding/decoding. The comments in the chart refer to this [URL=“http://en.wikipedia.org/wiki/Base64”]Wikipedia page on Base64. Even if you’re not familiar with the term, I’m guessing you may have seen some base-64 encoded data at some point, perhaps in an email header, it looks like this: TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlzIHNpbmd1bGFyIHBhc3Npb24gZnJ...

May 13, 2026 - The base64_encode filter does not require any arguments. Code Samples · Example 1: Encoding a String ·

import base64 from langchain.messages import HumanMessage from langchain_google_genai import ChatGoogleGenerativeAI model = ChatGoogleGenerativeAI(model="gemini-3.7-flash") pdf_bytes = open("path/to/your/document.pdf", "rb").read() pdf_base64 = base64.b64encode(pdf_bytes).decode("utf-8") mime_type = "application/pdf" message = HumanMessage( content=[ {"type": "text", "text": "Describe the document in a sentence."}, { "type": "file", "base64": pdf_base64, "mime_type": mime_type, }, ] ) response = model.invoke([message])

If you're not using Docker Desktop, you can configure the credential store in the Docker configuration file, which is located at $HOME/.docker/config.json on Linux or %USERPROFILE%/.docker/config.json on Windows. If you don't configure a credential store, Docker stores credentials in the config.json file in a base64-encoded format.

more examples 90HT31JOcypQp+IxMo5GOvVmQa53MvS6FaWELYGiPOBASxFhH8ka74gZNlnrt1Vt3O1nerDYbpIdmojosu6fWKnrH2qV4OowsZWSu7sBmQ55fJ9iRnatmqD8XEdtMBbBRDKCyUPDZATH7QCqlpBLFRJvYQLLvNeSg6X2IPQ8\/lfg3gO3vy6\/fiG9Zx\/pTNyOJjRRTDCH2CGamvR2OXTDtOuDCWFXWdGqXUUF1y0ww+3Ap5V4AWRDrHWWbTgQYqllT\/HpJ\/rEeBHaj5UTgNWVR\/Gf0yV3CXm7yDx6F9b2FqtFfUenC9cmCEenuxswrmtjXgnNaARcEBolaxi3mQuApQ== more ---------- dhQVFqFxTRDLhL05LYlsOlk36B2uS/qAuDakB/XFYL72H0lqY/sEzHB1Y4GCGlyPeZ1XCV76G9YGWqtqigWwDfGd7/rjBBlZumpIlMqWP5Qedb2fasNRYJvf6wxr5z5lCGFbwQH41Q9SgUN04KN6dD5qjP+FUry/6ubS1780X4UQhh7fTK3e1PSZxFg3CHa35M30aXichnkTAgF6ljh5vwJmrbW

So the decoding lookup table must ... there are gaps in the decoding table. For example, ASCII value 36 ('$') is not part of the Base64 character set, so there is a dummy element at position 36 in the decoding table....

Use this online file-base64 playground to view and fork file-base64 example apps and templates on CodeSandbox.

faker.image.dataUri() // 'data:image/svg+xml;charset=UTF-8,<svg xmlns="http...' faker.image.dataUri({ type: 'svg-base64' }) // 'data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3...'

Invoke PATCH /apis/v1/storage/secretEntities/:id to add the base64-encoded encryption details generated in step 3 to the secret entity, where :id is the secret entity ID returned in step 1. The following example request adds the base64-encoded encryption details to the secret entity.

base64 payload sample · Raw · payload.py · This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters ·

Email clients often block external images by default. Base64 encoded images are embedded directly in your email HTML, ensuring your images display immediately without requiring user permission or external server access.