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
- Loan Calculator — Monthly payment, total interest, and amortization schedule
- Savings Goal Calculator — Plan how to reach your savings goal over time
- Currency Converter — Convert between world currencies with live rates
- Buy vs Rent Calculator — Compare buying a home versus renting and investing the difference
Development
- JSON Formatter — 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
- Variable Naming Converter — Convert text between camelCase, snake_case, kebab-case, PascalCase, 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
- UUID Generator — Generate random UUIDs (v4) in bulk
- Cron Expression Parser — Parse cron expressions into plain English
- YAML / JSON Converter — Convert between YAML and JSON formats
- Diff Checker — Compare two texts and highlight the differences
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
- Coin Flip — Flip a coin one or more times
- Dice Roller — Roll dice of any type with statistics
Everyday
- Password Generator — Generate strong, random passwords
- QR Code Generator — Create QR codes from text or URLs
- Percentage Calculator — Calculate percentages, ratios, and percentage changes
- Word & Character Counter — Count words, characters, sentences, and estimate reading time
- BMI Calculator — Calculate Body Mass Index with health categories
- Countdown Timer — Count down to any date with live updating
All tools run entirely in your browser. No data is sent to any server.