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Base64 decoder

World's simplest base64 tool

This online program converts base64 data back to human-readable data. It supports regular base64 and chunked base64 (that's split into several lines). It can also decode multiple individual base64 values at once when the multi-line decoding mode is turned on in the options. Created by encoding gurus from team Browserling.
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Multi-line Decoding
Use this option if each line of the input has been encoded separately.
If the input is chunked base64, then you must add an extra empty line between the individual base64 data segments.
Base64 decoder tool What is a base64 decoder?
This application works in your browser and it decodes the input base64 data. The input data can be presented in three ways: it can be a long base64 string on a single line, it can be chunked base64 on multiple lines (usually each line is 76 characters long), or it can be multiple independent base64 values on multiple lines. The data in base64 format uses Latin alphabet letters (a-z and A-Z), digits (0-9), symbols "+" and "/", and the padding character "=". Each base-64 character contains 6 bits of information. When all characters are joined together they form a binary sequence with every 8 bits representing a byte of the original human-readable data. Depending on how you count, base-64 uses 25% or 33% more space than the original data. If you enable the "Decode Lines Individually" option, then each input line will be decoded independently from other lines. Base64abulous!
Base64 decoder examples Click to use
Single-line Base-64
In this example, the input is a single-line base-64 string. Unless you live on a planet where base-64 is the native language, the encoded data is an unreadable sequence of characters. The program easily decodes the input base-64 sequence and forms a human-readable text quote. The conversion is done by taking every 4 input base-64 symbols and using the base-64 lookup table, finding the 3 regular characters that they represent.
TGlmZSBpcyBhIHJvbGxlciBjb2FzdGVyLg==
Life is a roller coaster.
Required options
These options will be used automatically if you select this example.
Use this option if each line of the input has been encoded separately.
Decode Lines Separately
In this example, each line of the input was encoded separately and we want to quickly decode all of them at once. To get it done, we enable the parallel processing option, which splits the input into lines and calls the base-64 decode function on all lines at once. It turns out that the short encoded data are cardinal directions.
Tm9ydGg= RWFzdA== U291dGg= V2VzdA==
North East South West
Required options
These options will be used automatically if you select this example.
Use this option if each line of the input has been encoded separately.
Chunked Multi-line Base-64
The input base-64 in this example consists of three separately encoded data pieces, which have also been chunkified into constant-length fragments. To separate the chunkified fragments from individual base-64 segments, an empty line is inserted between them. The program applies the multi-line decoding mode to all segments and returns three unique Unicode emojis.
VGhlIFN1 biDimIA= VGhlIE1v b24g4pi+ VGhlIFRy dXRoIOKY rw==
The Sun ☀ The Moon ☾ The Truth ☯
Required options
These options will be used automatically if you select this example.
Use this option if each line of the input has been encoded separately.
Pro tips Master online base64 tools
You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
https://onlinebase64tools.com/base64-decode?input=TGlmZSBpcyBhIHJvbGxlciBjb2FzdGVyLg%3D%3D&multi-line=false
All base64 tools
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Quickly split base64 data into multiple lines.
Quickly merge multi-line base64 chunks into a single line.
Quickly convert data to base64 encoding.
Quickly convert data from base64 to regular data.
Quickly generate valid random base64 data for testing.
Quickly check if the input data is valid base64.
Coming soon These base64 tools are on the way
Print Base64 Statistics
Analyze base64-encoded data and print information about it.
Create Errors in Base64 Data
Introduce random errors in the given base64-encoded data.
Encode Data to Base26
Convert data to base26 encoding.
Decode Base26 Data
Convert base26-encoded data to regular data.
Convert Base64 to Base26
Convert data in base-64 encoding to base-26 encoding.
Convert Base26 to Base64
Convert data in base-26 encoding to base-64 encoding.
Generate Random Base26 Data
Create valid random base26-encoded data.
Encode Data to Base32
Convert data to base32 encoding.
Decode Base32 Data
Convert base32-encoded data to regular data.
Convert Base64 to Base32
Convert base-64 data to base-32 data.
Convert Base32 to Base64
Convert base-32 data to base-64 data.
Generate Random Base32 Data
Create valid random base32-encoded data.
Encode Data to Base36
Convert data to base36 encoding.
Decode Base36 Data
Convert base36-encoded data to regular data.
Convert Base64 to Base36
Convert base-64 encoded data to base-36 encoded data.
Convert Base36 to Base64
Convert base-36 encoded data to base-64 encoded data.
Generate Random Base36 Data
Create valid random base36-encoded data.
Encode Data to Base45
Convert data to base45 encoding.
Decode Base45 Data
Convert base45-encoded data to regular data.
Convert Base64 to Base45
Convert base-64 encoded data to base-45 encoded data.
Convert Base45 to Base64
Convert base-45 encoded data to base-64 encoded data.
Generate Random Base45 Data
Create valid random base45-encoded data.
Encode Data to Base58
Convert data to base58 encoding.
Decode Base58 Data
Convert base58-encoded data to regular data.
Convert Base64 to Base58
Convert data in base-64 encoding to data in base-58 encoding.
Convert Base58 to Base64
Convert data encoded in base-58 to data encoded in base-64.
Generate Random Base58 Data
Create valid random base58-encoded data.
Encode Data to Base62
Convert data to base62 encoding.
Decode Base62 Data
Convert base62-encoded data to regular data.
Convert Base64 to Base62
Convert base-64 data to base-62 data.
Convert Base62 to Base64
Convert base-62 data to base-64 data.
Generate Random Base62 Data
Create valid random base62-encoded data.
Encode Data to Ascii85
Convert data to Ascii85 encoding.
Decode Ascii85 Data
Convert ascii85-encoded data to regular data.
Convert Base64 to Ascii85
Convert base-64 encoding to Ascii-85 encoding.
Convert Ascii85 to Base64
Convert Ascii-85 encoding to base-64 encoding.
Generate Random Ascii85 Data
Create valid random ascii85-encoded data.
Convert Base64 to Uuencoding
Convert base-64 data to uuencoded data.
Convert Uuencoding to Base64
Convert uuencoded data to base-64 encoded data.
Convert Base64 to Xxencoding
Convert base-64 data to xxencoded data.
Convert Xxencoding to Base64
Convert xxencoded data to base-64 encoded data.
Convert Base64 to Binary
Convert base-64 data to binary data.
Convert Binary to Base64
Convert binary data to base-64 data.
Convert Base64 to Octal
Convert base-64 encoding to octal base.
Convert Octal to Base64
Convert octal base to base-64 encoding.
Convert Base64 to Decimal
Convert base-64 encoded data to decimal numbers.
Convert Decimal to Base64
Convert decimal numbers to base-64 encoded data.
Convert Base64 to Hex
Convert base-64 data to hexadecimal base.
Convert Hex to Base64
Convert hexadecimal base to base-64 data.
Convert Base64 to File
Convert base-64 data to a downloadable file.
Convert File to Base64
Convert any file to base-64 data.
Replace Base64 Alphabet
Swap one base64 index table with another.
Remove Base64 Padding
Remove padding from the end of base64 data.
Add Base64 Padding
Append extra padding to base64 data.
Compress Base64 Data
Use a more compact base64 representation.
ROT13-encode Base64
Apply ROT13 encryption algorithm on base64 data.
ROT13-decode Base64
Decrypt previously ROT-13 encoded base64 data.
ROT32-encode Base64
Apply ROT32 encryption algorithm on base64 data.
ROT32-decode Base64
Decrypt previously ROT-32 encoded base64 data.
ROT47-encode Base64
Apply ROT47 encryption algorithm on base64 data.
ROT47-decode Base64
Decrypt previously ROT-47 encoded base64 data.
Btoa-encode Data
Encode data using the original btoa program.
Btoa-decode Data
Decode previously encoded btoa-data (run atob program).
Obfuscate Base64
Obfuscate base64 data by adding fake delimiters.
Generate Fake Base64
Create real-looking base64 data that is fake.
Generate Symmetric Base64
Create base64 data that is a palindrome.
Glitch Base64
Add glitches to base64-encoded data.
Destroy Base64
Let Zalgo destroy base64-encoded data.