Welcome!
Useful browser-based tools — free, instant, no sign-up required.
Money
- Investment Calculator — See how your money grows over time with compound interest
- Mortgage Calculator — Monthly payment, total interest, and year-by-year amortization
Development
- JSON Tools — Format, minify, sort keys, stringify, and destringify JSON
- Base64 Encoder/Decoder — Encode text to Base64 or decode Base64 back to text
- URL Encoder/Decoder — Encode or decode URL components
- Hash Calculator — Calculate SHA-256, SHA-384, SHA-512, SHA-1, or MD5 hashes
- Unix Timestamp Converter — Convert between Unix timestamps and human-readable dates
- Regex Tester — Test regular expressions with match highlighting and capture groups
- Case Converter — Convert text between camelCase, snake_case, kebab-case, and more
- Color Converter — Convert between HEX, RGB, and HSL with live preview
- Sequence Generator — Generate numeric sequences with custom prefix, suffix, and separator
- Symmetric Key Generator — Generate random AES keys in hex, Base64, or raw bytes
- Asymmetric Key Generator — Generate RSA or EC key pairs in PEM format
Random
- Random Picker — Pick one or more random items from a list
- Random Number Generator — Generate random numbers within a range
- List Randomizer — Shuffle any list instantly
All tools run entirely in your browser. No data is sent to any server.