All Developer Tools
All Developer Tools brings related tools together in a clear workflow. Core features are free and require no account.
● Private and mostly local in your browserNumber Base Converter
Convert integers between binary, octal, decimal and hexadecimal. Characters that are invalid for the selected source base are rejected.
Unix Timestamp Converter
Translate Unix timestamps into local time and UTC, or create seconds since 1 January 1970 from a date and time.
CSV to JSON
Read CSV data with a header row and produce structured JSON objects. Quotes, delimiters and empty fields are handled during parsing.
JSON to CSV
Turn a list of similar JSON objects into a CSV table. Keys become columns and special characters are escaped correctly.
Image to Base64
Create a Base64 data URL from a local image for CSS, HTML or testing. File type, size and resulting text length remain visible.
Text to Binary
Encode Unicode text byte by byte as binary, or decode space-separated 8-bit values. UTF-8 preserves international characters.
Regex Tester
Test regular expressions and flags against multiline text. Matches, groups and positions are listed, while invalid patterns receive a clear error.
Base64 Encoder/Decoder
A practical helper for code and data.
JSON Formatter
A practical helper for code and data.
CSS Minifier
A practical helper for code and data.
Recommended workflow
Validate the input before converting it, verify structure and encoding, then copy the checked result.
Frequently asked questions
Are my contents stored?+
Local tools do not send files or inputs to Tools Universe; personal settings remain in the browser.
Can I use the tools on mobile?+
Yes. Controls support current browsers on iPhone, Android, tablets and desktop computers.