Free Online Tools: Browser-Based Utilities

Run developer and productivity tools directly in your browser tab. JSON formatter, color picker, password generator, word counter, and more. Zero install, zero tracking.

Browser-based tools, nothing to install

Every tool on Zovo runs entirely client side in your browser. Nothing to download, no account to create, no tracking. Your input stays on your device and is discarded when you close the tab.

They work offline too. Once the page has loaded you can disconnect and keep using it, which is useful for sensitive data or air gapped machines.

The busiest tool in the set is the free flowchart maker. Drag process boxes, decision diamonds and start/end shapes onto a canvas, connect them with arrows, and export the finished flowchart or workflow diagram as PNG or SVG. No account, no watermark, no upload.

Most used tools

Payroll and tax calculators

Time clock and hours

Counting hours is a separate job from working out pay. To add up clock in and clock out times across a week, including unpaid breaks, start with the timecard calculator. Once you have the weekly total, carry it into the payroll calculator to see withholdings and net pay.

Mortgage and property calculators

Loan and credit calculators

Budgeting and household costs

Investing and retirement

Business and pricing

Developer and data tools

Design and media tools

Writing and text tools

Math and science calculators

Health and fitness calculators

Unit converters

Currency converters

File converters

Home and material calculators

Electrical and engineering

Chemistry calculators

Time and date tools

Study and grading tools

Generators

Other free tools

Telegram group bots

Ten free bots that run inside a Telegram group chat rather than a browser tab: RSVPs, shared expenses, reminders, timezones and the rest. Each one has a free tier, needs no account, and in most cases needs no admin rights either.

Elsewhere on Zovo

If a tool needs to live in the browser rather than in a tab, the Chrome extension catalogue covers what Zovo publishes and the best-of lists cover the rest of the ecosystem by category. When an extension you rely on stops loading, the guide to Chrome extensions not working identifies the failure from the error message, and the bookmark recovery guide covers the separate case of a bookmark tree that has gone missing.

The tools on this page run in a browser tab. The same work can also be handed to an AI assistant instead, through the MCP servers Zovo publishes: what those servers actually do on the free tier sets out which operations are free and where the paid tier starts.