All Tools

Convert numbers between binary, octal, decimal and hexadecimal instantly.

Convert Unix timestamps to human-readable dates and back, for free.

Decode JSON Web Tokens into readable header and payload, for free.

Convert colors between HEX, RGB, and HSL formats, for free.

Convert CSV files into JSON arrays instantly, right in your browser.

Convert a JSON array of objects into a CSV file instantly, in your browser.

Format and prettify YAML documents instantly in your browser.

Upload an image and instantly decode any QR code — processed entirely in your browser, never uploaded to a server.

Decode BER-TLV and EMV hex data into a readable tag tree.

Inspect ASTM-style laboratory messages as records, fields, control characters, and frames.

Calculate profit per unit from selling price, cost and fees.

Work backward from your desired profit margin to find the right selling price.

Estimate Amazon referral and FBA fees to see your net proceeds.

Estimate Etsy listing, transaction and payment processing fees.

Estimate eBay final value fees to see your net proceeds.

Estimate Shopify payment processing fees to see your net proceeds.

Estimate shipping cost from package dimensions and weight.

Calculate the discounted price and savings for tiered bulk orders.

Calculate profit per order after supplier cost, fees and ad spend.

Calculate wholesale and retail margins from cost, wholesale and retail price.

Calculate how many times your inventory is sold and replaced per year.

Calculate when to reorder stock before you run out.

Convert a nominal interest rate into its effective annual yield (APY).

Convert APY into an equivalent nominal annual rate; this is not a fee-inclusive loan APR.

Estimate your monthly mortgage payment, including taxes, insurance and PMI.

See a month-by-month loan payoff schedule, with optional extra payments.

Compare snowball vs. avalanche strategies to pay off multiple debts faster.

See how long it takes to pay off a credit card balance and how much interest you'll pay.

Find out how many months it takes to reach a savings goal with regular contributions.

Project your retirement savings balance based on your current age and contributions.

Calculate your FIRE number and how many years until financial independence.

Find your emergency fund target and how long it takes to reach it.

Calculate the total return and net gain on an investment, including any income received.

Calculate the compound annual growth rate between a beginning and ending value.

Calculate a stock's dividend yield from its annual dividend and share price.

Project how much a present sum (plus optional contributions) will be worth in the future.

Find out what a future sum of money is worth today, given a discount rate.

Calculate the net present value of an investment's future cash flows.

Calculate the internal rate of return for a series of cash flows.

See what an amount will cost in the future, and what future money is worth today, at a given inflation rate.

Add up your assets and liabilities to calculate your total net worth.

Track your monthly income and expenses to see your net cash flow.

Create free QR codes for links, text and more.

Generate strong, random passwords for free.

Generate random hexadecimal numbers for free.

Generate random strings with custom characters, for free.

Generate random UUID v4 identifiers, one or thousands at a time.

Generate classic Lorem Ipsum placeholder text for free.

Generate random numbers in any range, instantly and for free.

Generate random IPv4 addresses instantly and for free.

Generate random MAC addresses instantly and for free.

Generate random dates within any date range, instantly and for free.

Paste a list, pick random winners instantly.

Generate the first N prime numbers instantly.

Generate the first N Fibonacci numbers, exactly.

Get the first N decimal digits of pi, verified and exact.

Generate fake, Luhn-valid credit card numbers for testing — not real cards, cannot be used for purchases.

Generate checksum-valid Turkish ID candidates for software testing only; random results may coincide with assigned numbers.

Compress JPG, PNG and WebP images without losing quality.

Resize an image to exact pixel dimensions right in your browser.