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Text file truncator

World's simplest file tool
This is a free browser-based utility that truncates textual files. You can specify the number of characters (truncate by character count option) or the number of bytes (truncate by file size option) to be left in the file, and the program will truncate the file to this value. You can also choose the side of truncation, truncate several lines of the file at once, and add an indicator mark at the truncation point. Created by computer geeks at team Browserling.
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Truncation Method
Truncate text file to this number of symbols.
Truncate text file to this size. (Examples: 64b, 256k, 16m)
Truncation Position
Drop characters (bytes) from the end of the file.
Drop characters (bytes) from the beginning of the file.
Multiline and Mark
In the case of a multiline file, truncate each line individually. (In this case, each line will have the specified number of characters/bytes.)
Insert this symbol (truncation mark) at the truncation point. (Truncation mark length is included in the total length.)

What is a text file truncator?

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This online program shortens files containing text data to the specified symbol length or byte count. If you select the symbol count truncation mode, then the input data will be split into individual Unicode symbols (also known as glyphs or graphemes) and the exact number of symbols will be returned in the output data. If you select the file size truncation mode, then you can specify the exact file length in bytes. For example, "123" or "123b" will leave precisely 123 bytes in the file, "100k" will leave precisely 100 kilobytes (100×1024 bytes), and "2mb" will leave precisely 2 megabytes (2×1024×1024 bytes). If we compare both truncation methods, then the first method will most likely produce a bigger text file with more bytes in it. This is because each Unicode character can be single-byte (in case of plain ASCII data) or multi-byte (in case of UTF8 data), and if there is at least one complex multi-byte character in the input, then the size of the output file in bytes will be greater than the total number of symbols in the input. For example, Unicode characters π and © take two bytes in UTF8 encoding, characters ✓ and € take three bytes, and characters 𝕭 and 🦇 take four bytes. If the output file has to be reduced in size, then the multi-byte character on the truncation boundary is split into bytes, and the leftover bytes are printed as corresponding extended ASCII characters. For both file truncation modes, you can select the truncation side – it can be the start of the file or the end of the file. To indicate where the truncation happened, you can mark it with a prefix or suffix truncation mark character (the size of the mark is included in the final length). Also, when working with multi-line textual files, you can use the separate line-truncation option. In this case, the length/size and all other properties above will be applied to each line of the file individually. Filabulous!

Text file truncator examples

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James Allen Quote
This example truncates a textual file that contains a James Allen quote to just sixty symbols. The characters are counted from the beginning of the file. Wide characters that are made from multiple bytes (such as ” and ©) are counted as one character. The truncated output file consists of exactly 60 characters but because of wide characters in it, the size is slightly larger (64 bytes).
“Calmness of mind is one of the beautiful jewels of wisdom.” © James Allen
“Calmness of mind is one of the beautiful jewels of wisdom.”
Required options
These options will be used automatically if you select this example.
Truncate text file to this number of symbols.
Drop characters (bytes) from the end of the file.
In the case of a multiline file, truncate each line individually. (In this case, each line will have the specified number of characters/bytes.)
Truncate Text to 1 Kilobyte
In this example, we needed to truncate the file to precisely one kilobyte. To do this, we switched on the truncate-by-size mode and entered the value 1k in the size field (1k = 1 kilobyte = 1024 bytes). The text file uses letters written in a bold Unicode font and each letter is four bytes long. As the last Unicode letter doesn't fit in the required 1024 bytes, it's broken into UTF8 bytes and they are output as-is and displayed as two Latin-1 supplementary characters.
𝐏𝐨𝐥𝐚𝐫 𝐛𝐞𝐚𝐫𝐬 𝐚𝐫𝐞 𝐧𝐞𝐚𝐫𝐥𝐲 𝐮𝐧𝐝𝐞𝐭𝐞𝐜𝐭𝐚𝐛𝐥𝐞 𝐛𝐲 𝐢𝐧𝐟𝐫𝐚𝐫𝐞𝐝 𝐜𝐚𝐦𝐞𝐫𝐚𝐬 𝐓𝐡𝐞𝐫𝐦𝐚𝐥 𝐜𝐚𝐦𝐞𝐫𝐚𝐬 𝐝𝐞𝐭𝐞𝐜𝐭 𝐭𝐡𝐞 𝐡𝐞𝐚𝐭 𝐥𝐨𝐬𝐭 𝐛𝐲 𝐚 𝐬𝐮𝐛𝐣𝐞𝐜𝐭 𝐚𝐬 𝐢𝐧𝐟𝐫𝐚𝐫𝐞𝐝, 𝐛𝐮𝐭 𝐩𝐨𝐥𝐚𝐫 𝐛𝐞𝐚𝐫𝐬 𝐚𝐫𝐞 𝐞𝐱𝐩𝐞𝐫𝐭𝐬 𝐚𝐭 𝐜𝐨𝐧𝐬𝐞𝐫𝐯𝐢𝐧𝐠 𝐡𝐞𝐚𝐭. 𝐓𝐡𝐞 𝐛𝐞𝐚𝐫𝐬 𝐤𝐞𝐞𝐩 𝐰𝐚𝐫𝐦 𝐝𝐮𝐞 𝐭𝐨 𝐚 𝐭𝐡𝐢𝐜𝐤 𝐥𝐚𝐲𝐞𝐫 𝐨𝐟 𝐛𝐥𝐮𝐛𝐛𝐞𝐫 𝐮𝐧𝐝𝐞𝐫 𝐭𝐡𝐞 𝐬𝐤𝐢𝐧. 𝐀𝐝𝐝 𝐭𝐨 𝐭𝐡𝐢𝐬 𝐚 𝐝𝐞𝐧𝐬𝐞 𝐟𝐮𝐫 𝐜𝐨𝐚𝐭 𝐚𝐧𝐝 𝐭𝐡𝐞𝐲 𝐜𝐚𝐧 𝐞𝐧𝐝𝐮𝐫𝐞 𝐭𝐡𝐞 𝐜𝐡𝐢𝐥𝐥𝐢𝐞𝐬𝐭 𝐀𝐫𝐜𝐭𝐢𝐜 𝐝𝐚𝐲.
𝐏𝐨𝐥𝐚𝐫 𝐛𝐞𝐚𝐫𝐬 𝐚𝐫𝐞 𝐧𝐞𝐚𝐫𝐥𝐲 𝐮𝐧𝐝𝐞𝐭𝐞𝐜𝐭𝐚𝐛𝐥𝐞 𝐛𝐲 𝐢𝐧𝐟𝐫𝐚𝐫𝐞𝐝 𝐜𝐚𝐦𝐞𝐫𝐚𝐬 𝐓𝐡𝐞𝐫𝐦𝐚𝐥 𝐜𝐚𝐦𝐞𝐫𝐚𝐬 𝐝𝐞𝐭𝐞𝐜𝐭 𝐭𝐡𝐞 𝐡𝐞𝐚𝐭 𝐥𝐨𝐬𝐭 𝐛𝐲 𝐚 𝐬𝐮𝐛𝐣𝐞𝐜𝐭 𝐚𝐬 𝐢𝐧𝐟𝐫𝐚𝐫𝐞𝐝, 𝐛𝐮𝐭 𝐩𝐨𝐥𝐚𝐫 𝐛𝐞𝐚𝐫𝐬 𝐚𝐫𝐞 𝐞𝐱𝐩𝐞𝐫𝐭𝐬 𝐚𝐭 𝐜𝐨𝐧𝐬𝐞𝐫𝐯𝐢𝐧𝐠 𝐡𝐞𝐚𝐭. 𝐓𝐡𝐞 𝐛𝐞𝐚𝐫𝐬 𝐤𝐞𝐞𝐩 𝐰𝐚𝐫𝐦 𝐝𝐮𝐞 𝐭𝐨 𝐚 𝐭𝐡𝐢𝐜𝐤 𝐥𝐚𝐲𝐞𝐫 𝐨𝐟 𝐛𝐥𝐮𝐛𝐛𝐞𝐫 𝐮𝐧𝐝𝐞𝐫 𝐭𝐡𝐞 𝐬𝐤𝐢𝐧. 𝐀𝐝𝐝 𝐭𝐨 𝐭𝐡𝐢𝐬 𝐚 𝐝𝐞𝐧𝐬𝐞 𝐟𝐮𝐫 𝐜𝐨𝐚𝐭 𝐚𝐧𝐝 𝐭𝐡𝐞𝐲 𝐜𝐚𝐧 𝐞𝐧𝐝𝐮𝐫𝐞 𝐭𝐡𝐞 𝐜𝐡𝐢𝐥𝐥𝐢𝐞𝐬𝐭 ð
Required options
These options will be used automatically if you select this example.
Truncate text file to this size. (Examples: 64b, 256k, 16m)
Drop characters (bytes) from the end of the file.
In the case of a multiline file, truncate each line individually. (In this case, each line will have the specified number of characters/bytes.)
World Chess Champions
In this example, we load a multi-line file with a list of chess championship winners from the years 1993 to 2006 and we want to reduce the file size without losing the names of champions. To do this, we enable individual line truncation mode, select the "Truncate from the Beginning" option, and shrink each string to 23 bytes. Also, to mark the place of truncation, we add an arrow symbol on the left side (the size of which is taken into account in the total file size). Thus, from six strings on six lines, we get a file of size 6×23 + 5 newlines = 143 bytes.
1993–1999 years – Russia – Anatoly Karpov 1999–2000 years – Russia – Alexander Khalifman 2000–2002 years – India – Viswanathan Anand 2002–2004 years – Ukraine – Ruslan Ponomariov 2004–2005 years – Uzbekistan – Rustam Kasimdzhanov 2005–2006 years – Bulgaria – Veselin Topalov
⟹ Anatoly Karpov ⟹ Alexander Khalifman ⟹ Viswanathan Anand ⟹ Ruslan Ponomariov ⟹ Rustam Kasimdzhanov ⟹ Veselin Topalov
Required options
These options will be used automatically if you select this example.
Truncate text file to this size. (Examples: 64b, 256k, 16m)
Drop characters (bytes) from the beginning of the file.
In the case of a multiline file, truncate each line individually. (In this case, each line will have the specified number of characters/bytes.)
Insert this symbol (truncation mark) at the truncation point. (Truncation mark length is included in the total length.)
Pro tips Master online file 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://onlinefiletools.com/truncate-text-file?input=%E2%80%9CCalmness%20of%20mind%20is%20one%20of%20the%20beautiful%20jewels%20of%20wisdom.%E2%80%9D%20%C2%A9%20James%20Allen&truncate-by-count=true&length=60&truncate-right=true&multi-line=false&use-postfix=false
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