Every tool you need, running in your browser

• JSON Formatter

  Beautify or minify JSON, with errors pinned to the line

• Loan Calculator

  Work out your repayment, total interest and true cost

• Password Generator

  Cryptographically secure passwords, generated entirely in your browser

• Base64 Encode / Decode

  Full Unicode support, including URL-safe Base64

• Percentage Calculator

  Three percentage questions, each with its own answer

• SERP Preview

  See how your page looks in Google search results

• UUID Generator

  Bulk v4 and v7 UUIDs from your browser's crypto API

• Compound Interest Calculator

  See what your savings grow into, with or without regular contributions

Browse by category

• Financial Calculators

  Loans, interest, tax and salary maths

  10 tools

• Developer Tools

  Format, validate, encode, decode

  15 tools

• Text Tools

  Count, clean, transform text

  10 tools

• SEO Tools

  Metadata, schema and previews

  10 tools

• Security Tools

  Passwords and hashing

  5 tools

• Image Tools

  Compress, convert, resize

  5 tools

Recently added

• Age Calculator

  Exact age in years, months and days — plus the total in every unit

• Base64 Encode / Decode

  Full Unicode support, including URL-safe Base64

• Base64 Image Encoder

  Encode images to Base64 data URIs and decode them back

• Canonical Tag Generator

  Generate a canonical link tag from any URL

• Nothing leaves your device

  Every tool runs client-side. Files you open, text you paste and numbers you type are processed in your browser and never uploaded to a server.

• Instant results

  Pages are pre-rendered and served from the edge, and tools compute locally — so there is no round trip between typing and seeing the answer.

• Free, no account

  No sign-up, no trial, no usage limits. Open a tool and use it.