Convert text to and from Base64 strings. Supports standard and URL-safe encoding, and is compatible with UTF-8 and multiple character sets.
Image to Base64 Converter
Convert JPG, PNG, and other image files to Base64 strings online. Generate Data URLs instantly for web development and data embedding.
Base58 Encoder & Decoder
Easily convert text to Base58 and vice versa. Ideal for blockchain address processing and data verification.
Android Permission Lookup & Reference Guide
Provides developers and users with instant plain English names and functional descriptions for standard Android permission strings.
Caesar Cipher Encoder & Decoder
Easily encrypt and decrypt text using the Caesar cipher (shift cipher) with custom alphabets and shift values online.
Image to Base64 Converter
Convert JPG, PNG, and other image files to Base64 strings online. Generate Data URLs instantly for web development and data embedding.
Base58 Encoder & Decoder
Easily convert text to Base58 and vice versa. Ideal for blockchain address processing and data verification.
Android Permission Lookup & Reference Guide
Provides developers and users with instant plain English names and functional descriptions for standard Android permission strings.
Caesar Cipher Encoder & Decoder
Easily encrypt and decrypt text using the Caesar cipher (shift cipher) with custom alphabets and shift values online.
Base32 Encoder and Decoder
Base32 encoder and decoder tool for converting binary data into readable alphanumeric strings. Ideal for DNSSEC, file naming, and more.
When you need to embed binary data, such as images or keys, into text-based protocols (like HTTP or JSON) or transmit them safely as URL parameters, using raw bytes directly can cause garbled text or transmission errors. This tool is designed to solve this exact problem. Using the Base64 algorithm, it converts any binary data (or byte sequences converted from specific character encodings) into a string composed of 64 ASCII characters (A-Z, a-z, 0-9, +, /, =), enabling safe text-based data representation. Simply input your original text or Base64 string, and the tool will perform a two-way conversion, outputting the corresponding Base64 encoded result or the decoded original text.
Q: What should I do if the decoded Base64 text is garbled?
This is usually caused by using different character sets for encoding and decoding. Please ensure that you have selected the same character set (e.g., UTF-8) in the "Character Encoding" dropdown menu that was used when the original text was encoded. Base64 encodes bytes, and the character set determines the rules for converting text to bytes.
Q: What is URL-safe Base64?
URL-safe Base64 is a variant that replaces the "+" and "/" characters in standard Base64 results with "-" and "_" respectively, and typically omits the "=" padding character. This allows the encoded string to be used directly as a URL parameter or filename without requiring additional URL encoding.
Please note that Base64 encoding increases the data size by approximately 33%. When decoding, ensure that the input Base64 string is formatted correctly (the length is usually a multiple of 4, and the character set is valid). This tool performs all calculations locally in your browser; your input data is never uploaded to our servers. However, we still recommend exercising caution when handling highly sensitive information. For extremely long text, please be aware of browser performance limitations.
Base64 is not an encryption algorithm; it is merely an encoding format. Its contents can be easily decoded, so please do not use it to secure sensitive information. In actual development, it is commonly used to embed small images in Data URLs (e.g., 
), or to pass structured information in HTTP Basic Auth and the Payload section of JSON Web Tokens (JWT). A typical example: encoding the text "Hello" using UTF-8 and standard Base64 results in "SGVsbG8="; encoding the same text using the URL-safe mode results in "SGVsbG8".
