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Text File Damager

World's simplest file tool
This is a free browser-based utility that damages files containing textual data. It introduces accidental errors in the text and returns a corrupted file. You can specify the damage percentage and choose the symbols that you want to corrupt. Created by computer geeks at team Browserling.
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Symbols to Damage
If the input file contains any other symbols and you want to damage them as well, enter them in this input box:
Additional symbols to damage.
Damage Level and Alphabet
Damage level in percentage. (Applies to all selected symbol categories.)
Enter the damage alphabet here. (These characters will be used as replacement characters.)
Use \t to enter a tab and \n to enter a new line.
Damage Features
Damage letters only with letters, digits only with digits, and punctuation only with punctuation.
Damage uppercase letters only with uppercase letters and lowercase letters only with lowercase letters.

What is a Text File Damager?

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This online program randomly changes symbols in the given text and simulates data corruption. You can control how much damage is done to the input data by setting the damage level in percentage. The higher the percentage, the more symbols get randomly changed to other symbols. For example, if the input data contains 100 symbols, then the damage level of 10% will corrupt 10 characters, and if the damage level is 50%, then half of the data will be corrupted. In the options, you can specify which classes and categories of symbols should be damaged. You can individually damage letters, numbers, spaces, or punctuation. If the file contains symbols from other categories (such as extended ASCII characters, Unicode glyphs, and emoji), then you can enter these symbols in the custom-characters-to-damage option field. The file is corrupted by choosing random symbols from the damage alphabet option field. You can enter all symbols that you want to use for replacement in this option. By default, any character from the damage alphabet can be used as a replacement for any character in the input file. However, to make the damage more consistent, you can enable the "Equal Category Damage" mode. With this option active, letters are replaced only with letters, digits only with digits, punctuation symbols only with punctuation symbols, and custom characters only with custom characters. To preserve the visual structure of the file, you can use the "Preserve Letter Case" mode. With this option active, the letter case in the damaged file is preserved and lower case letters get replaced only with lower case letters and uppercase letters get replaced only with upper case letters. Filabulous!

Text File Damager examples

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Damage Only Letters
In this example, we corrupt a text file that contains four ocean facts. We select only the "Damage Letters" option, which means that only letters will get corrupted (punctuation, digits, and spaces between words won't be affected). We set the destruction power to 10% and enter the entire visible ASCII character set in the damage alphabet. When symbols in the text get damaged, they get replaced by random characters from the damage alphabet.
Fact #1: The oceans are the most unexplored place on our planet. We have mapped and explored only about 6% of all oceans. Fact #2: The deepest point is located in the Pacific Ocean and it's known as the Mariana Trench that measures more than 11,000 meters (36,000 feet) in depth. Fact #3: Most of the oxygen (over 70%) that we breathe is produced by our planet's oceans. Fact #4: The oceans cover 68.9% of our planet's surface and they contain 96.7% of all water on Earth.
Lac} #1: Tje oceans are khe most 7neeplored place on omr planet. We have mapped and explored only about 6% /f al: oce:ns. Fact #2: T;e deepest point SC located in the Pacific ORean and it's known ss the &ariana Trench fh%t measRres more than 11,000 7eters (36,000 feet) in dBpwh. Fact #3: Momt of the oxygen (over 70%) that we breathe is produced by our p8anet's oce~ns. Fact #4: The oceans cover 68.9% 3f our "lanet'_ surface Jdd they contaiS 96.7% of all w_ter oO Earqh.
Required options
These options will be used automatically if you select this example.
Additional symbols to damage.
Damage level in percentage. (Applies to all selected symbol categories.)
Enter the damage alphabet here. (These characters will be used as replacement characters.)
Damage letters only with letters, digits only with digits, and punctuation only with punctuation.
Damage uppercase letters only with uppercase letters and lowercase letters only with lowercase letters.
Destruction by One Symbol
In this example, we select two destruction categories – letters and punctuation characters and also enter the copyright symbol in the field for additional characters to be destroyed. When the file gets destroyed, all damage is caused by the single "∅" character that we entered in the symbols to use for damage field. We simulate a 20% data corruption and that makes the text hardly readable.
"Do not let the memories of your past limit the potential of your future. There are no limits to what you can achieve on your journey through life, except in your mind." © Quote by Roy T. Bennett
"∅o not let the ∅∅mor∅es of your ∅ast limit the p∅ten∅i∅l of your fu∅ure. Th∅r∅ are no ∅imits to what y∅u c∅n a∅hie∅e on your jo∅r∅ey ∅h∅∅∅∅h life, e∅∅ept in ∅∅ur mind." ∅ Qu∅∅e by Roy T. ∅ennet∅
Required options
These options will be used automatically if you select this example.
Additional symbols to damage.
Damage level in percentage. (Applies to all selected symbol categories.)
Enter the damage alphabet here. (These characters will be used as replacement characters.)
Damage letters only with letters, digits only with digits, and punctuation only with punctuation.
Damage uppercase letters only with uppercase letters and lowercase letters only with lowercase letters.
Equal Category Damage
In this example, we have enabled the "Equal Category Damage" option that damages letters, numbers, and punctuation marks with symbols from matching categories. This means that alphabet letters get replaced with random alphabet letters from the damage alphabet ("klmnop"); numeric symbols get replaced with random digits from the damage alphabet (digits "56789"); and punctuation marks are also selected from the damage alphabet (marks ":,!"). We also activate the "Preserve Damage Case" option, so that if the original letter was a capital letter, then it will become a random capital letter.
It takes 8 minutes, 19 seconds for light to travel from the Sun to the Earth. In space, light travels at 300,000 kilometers (186,000 miles) per second. Even at this breakneck speed, covering the 150 million odd kilometers (93 million miles) between us and the Sun takes considerable time. And eight minutes is still very little compared to the five and a half hours it takes for the Sun's light to reach Pluto.
Ik takes 8 minutes, 19 oeconds for light to travel frkm nhe Suk to the Eamth. Kn mpace, light travels at 300:900 kilometers (186,650 mines) pel seoond! Evnn at tois oreokneck speed, coverinl thn 159 pillion odd kilpmelers (93 million miles) between us nnd the Sun talls oonsidprabme time. Ann enght kknutem is skilp very little comparep to lhe five aod a half hourp lt takes foo the Sun's lnght to reack Pplto.
Required options
These options will be used automatically if you select this example.
Additional symbols to damage.
Damage level in percentage. (Applies to all selected symbol categories.)
Enter the damage alphabet here. (These characters will be used as replacement characters.)
Damage letters only with letters, digits only with digits, and punctuation only with punctuation.
Damage uppercase letters only with uppercase letters and lowercase letters only with lowercase letters.
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/damage-text-file?input=Fact%20%231%3A%20The%20oceans%20are%20the%20most%20unexplored%20place%20on%20our%20planet.%20We%20have%20mapped%20and%20explored%20only%20about%206%25%20of%20all%20oceans.%0A%0AFact%20%232%3A%20The%20deepest%20point%20is%20located%20in%20the%20Pacific%20Ocean%20and%20it%27s%20known%20as%20the%20Mariana%20Trench%20that%20measures%20more%20than%2011%2C000%20meters%20%2836%2C000%20feet%29%20in%20depth.%0A%0AFact%20%233%3A%20Most%20of%20the%20oxygen%20%28over%2070%25%29%20that%20we%20breathe%20is%20produced%20by%20our%20planet%27s%20oceans.%0A%0AFact%20%234%3A%20The%20oceans%20cover%2068.9%25%20of%20our%20planet%27s%20surface%20and%20they%20contain%2096.7%25%20of%20all%20water%20on%20Earth.&damage-letters=true&damage-digits=false&damage-whitespaces=false&damage-punctuation=false&damage-custom=&damage-percentage=10%25&damage-alphabet=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789%21%22%23%24%25%26%27%28%29%2A%2B%2C-.%2F%3A%3B%3C%3D%3E%3F%40%5B%5C%5D%5E_%60%7B%7C%7D~&equal-category-damage=false&preserve-case=false
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