Online tools

Free calculators and online utilities .

Use simple browser-based tools with no sign-up. Each page includes a working tool, examples, FAQs and related utilities.

See how we handle privacy, sources, limitations and maintenance for these utilities. About Cappriola tools.

Financial calculators

Simple calculators for percentages, interest and planning, meant for education and scenario comparison.

Financial calculators

Calculate compound interest with an initial amount, monthly contributions, rate and term.

Financial calculators

Calculate percentages, discounts, increases and percentage change quickly online.

Create QR codes, passwords and identifiers in the browser with practical usage guidance.

Useful generators

Create QR codes for links, text, email, phone, WhatsApp and Wi-Fi in your browser.

Useful generators

Generate strong random passwords with letters, numbers and symbols in your browser.

Format JSON and generate technical values for testing, integrations and payload review.

Developer tools

Paste JSON to format, validate, minify and copy the result in your browser.

Developer tools

Generate random UUID v4 values in your browser and copy them with one click.

Simple browser-based image edits with clear notes about technical limits.

Image tools

Remove white, green or simple solid-color image backgrounds in your browser without uploading the file.