All Tools VersePick a Winner: Fair Random Draws
Picking a winner fairly means giving every entry an equal chance, which a random picker does and a human eye cannot. Whether you are running a giveaway, d
Developer Guides
JSON, URL encoding, cron expressions, chmod, diffs, hashing and escaping, explained for daily use. Every companion tool runs client-side, so production data and configs never leave your machine.
Extract Keys and Values from JSON
Extracting the keys or values from JSON pulls out just the field names or just the data, which is how you map an unfamiliar structure or grab a column of
Clean a Messy CSV: Fix Quotes and Missing Fields
Cleaning a messy CSV means fixing the two problems that break imports: rows with missing fields and values that are not quoted correctly. A single ragged
Generate Data from a Regex Pattern
Generating data from a regex pattern produces strings that match a rule you define, so you can create realistic test values such as phone numbers, codes,
Extract or Delete CSV Columns
Editing CSV columns means extracting just the ones you need or deleting the ones you do not, without opening a spreadsheet or writing a script. A wide exp
Generate Random Bytes and Hex Strings
Generating random bytes or hex strings gives you unpredictable values for keys, tokens, test data, and salts, written either as raw byte numbers or as a c
AES Text Encryption in Your Browser
AES is the encryption standard that scrambles text into unreadable ciphertext, which only someone with the right password can turn back into the original.
Change CSV Delimiter and Convert CSV to TSV
Changing a CSV delimiter swaps the character that separates columns, most often switching between commas and tabs, which is the difference between a CSV a
Generate Random IP and MAC Addresses
Generating random IP and MAC addresses gives you valid-looking network identifiers for testing, documentation, and demos without using real ones. An IP ad
bcrypt: How Password Hashing Works
bcrypt is a password hashing function designed to be slow on purpose, which is exactly what makes it good at protecting passwords. Instead of storing a pa
CSV to YAML, XML and Markdown Table
CSV is not the only tabular format, and converting it to YAML, XML, or a Markdown table makes the same data fit different tools: YAML for configuration, X
Generate Test Data: JSON, CSV, TSV and XML
Generating test data gives you realistic fake records in JSON, CSV, TSV, or XML so you can build and test software without using real, sensitive informati