Converters & Generators
Frequently asked questions
Are files uploaded to a converter kept anywhere?
One rule applies across the whole section: processing runs with no result stored on the server any longer than it takes to answer. For some tools (the image converter) processing happens entirely in the browser – files never leave the device.
How is Base64 different from encryption?
Base64 is encoding, not data protection: anyone can decode the string back in a second. It should not be used to hide passwords or personal data.
Why do domains need a separate Punycode converter?
Browsers and DNS work with domains in ASCII. A domain like "münchen.de" is technically stored as a punycode string, and the converter shows that correspondence.
What makes a password generator reliable?
One that uses a cryptographically random source and allows a length from 12 characters with digits, mixed-case letters and symbols.
This section brings together utilities that turn one kind of data into another: text into a different case or number system, an image into a different format, randomness into a number, a password or a QR code.
Image and color converters
- Image converter and compression – converting between WebP, JPG, PNG and other formats with cropping and compression.
- Color converter – converting between HEX, RGB, HSL, CMYK, RAL and Pantone.
Text and code converters
- Transliteration and slug generator – turning a heading into a page address written in plain Latin letters.
- Case converter – bringing text to upper, lower or title case.
- Base64 encoding – reversible conversion of text and files into a Base64 string.
- Number system converter – converting numbers and text into binary and other codes.
- URL converter – encoding and decoding addresses (percent-encoding).
- IDN and Punycode converter – converting internationalised domains into ASCII format.
- Text cleaner – removing extra spaces and HTML tags.
- Reverse text – reversing a string character by character.
Generators
- Password generator – random passwords of a given length and character set.
- Random number generator – integers within a given range.
- QR code generator – a QR code from a link or text.
- MD5 and hash generator – a checksum of a string or file.
Reversible and irreversible conversions
Some converters work both ways: Base64 and the binary system can be turned back to the original without loss. Other conversions are irreversible by nature – changing text case erases the original mix of upper- and lowercase letters, a compressed image cannot be restored byte for byte, and an MD5 hash fundamentally cannot be decoded back into the original string. It is worth keeping a separate copy of an important file before converting it if the process is irreversible.
How to pick a tool for the task
If the task is to shrink an image's weight without losing quality, an image converter is needed, not a generator. If the task is to get an unpredictable value (a password, a number, a code), a generator is needed: unlike a converter, it has no input data beyond its settings.
Where to go next
Some converters from this section are used more by developers – the URL converter, Base64 converter and number system converter are also listed in the Developer Tools section. Preparing text before converting it is covered in Content & SEO Optimization.