Online tools

Discover AppErgo web tools: practical, fast and free.

AppErgo’s commitments for online tools:

100% free

All web tools are free to use, with no hidden trials or artificial limits.

No signup required

No account required, no unnecessary steps: use the tool right away.

Lightweight & fast

Tools designed to load quickly and stay smooth, even on mobile.

Easy to use

A clear, straightforward and pleasant interface, without unnecessary options.

Secure

No data entered or generated by the tools is sent to the AppErgo server.

No intrusive ads

No pop-ups, no forced surveys, and no anti-adblock messages.

These 6 commitments apply to AppErgo web tools that run directly in your browser. They summarize the choices made to keep this section simple, accessible, and pleasant to use every day. An article explains AppErgo’s online tools policy in more detail; feel free to read it.

Learn more

See all 201 AppErgo online tools

Audio

Metronome

Set tempo and play in time

Advanced metronome

Practise tempo with rhythms and count-in

Text

Text counter

Count characters, words and spaces.

Case converter

Convert case and text formats.

Random

Classic dice roller

Roll a classic 6-sided die and get an instant result.

Multi-sided dice roller

Roll a virtual die with the number of sides you choose.

Time

Countdown timer

Start a countdown with presets, progress and a visual alert.

Visual alarm

Set a visual alarm for a specific time.

Games

Tic-tac-toe

Play tic-tac-toe with two players in your browser.

Connect Four

Play Connect Four directly in your browser.

Conversion

Length converter

Convert meters, kilometers, feet, miles and other length units.

Weight converter

Convert grams, kilograms, pounds, ounces and tons.

Codes

Caesar cipher

Encode or decode a message with an exact alphabet shift.

Automatic Caesar decoder

Automatically test the 25 possible Caesar shifts.

Date

Exact age

Calculate an exact age in years, months and days.

Date in X days

Add or subtract days from a date.

WebDev

Contrast checker

Check the contrast between two colors.

Robots.txt generator

Create a clear and compact robots.txt.

Security

Password generator

Generate a strong local password

SHA generator

Calculate SHA-256, SHA-384 and SHA-512 hashes.

Fitness

Interval timer

Create a workout with effort, rest, rounds and preparation.

Tabata timer

Start a short, classic or longer Tabata workout.

See all 201 AppErgo online tools

Find the right online tool quickly

AppErgo brings together more than 200 free online tools, organized by category and available directly in your browser. They can help you edit text, decode a message, calculate dates, convert data, prepare a workout, complete a web development task or simply play a game.

No installation or account is required. Choose a category, open the tool you need and start using it immediately.

Tools organized by category

AppErgo tools are divided into 11 categories to make browsing easier:

Music: metronome and tempo detection with tap tempo.
Text: text counter, cleaning, case conversion and content comparison.
Random: dice, random wheel, random draws, team generation and number generators.
Time: countdowns, stopwatch, visual alarms and duration calculations.
Games: tic-tac-toe, Connect Four, Mastermind, Sudoku, Snake, Minesweeper and memory games.
Conversion: quick conversion of lengths, weights, temperatures and other common units.
Codes: Caesar cipher, Morse code, Vigenère, Atbash, binary codes, grids and decoding assistance tools.
Date: exact age, date in X days, business days, week numbers and differences between dates.
WebDev: Apache log analyzer, contrast checker and robots.txt generator.
Security: generate strong passwords locally, SHA generator, MD5 generator and CRC32 generator.
Fitness: interval timer, pace calculator and Tabata timer.

Why use AppErgo tools?

AppErgo focuses on clear and direct interfaces that provide only the options needed for each task. The tools are suitable for both occasional and regular use.

They are designed to remain lightweight, fast and easy to use on desktop computers, tablets and smartphones, with no mandatory signup, hidden trial or intrusive advertising.

Processing takes place in your browser

Data entered, imported or generated by the tools is processed directly in your browser. It is not sent to the AppErgo server.

This approach is particularly useful for text, images, passwords, encoded messages and technical data that you want to keep on your device.

Frequently asked questions

Are AppErgo tools really free?

Yes. All available tools can be used free of charge, with no payment, subscription or hidden trial.

Do I need to create an account?

No. No account is required. You can open a tool and start using it immediately.

Do I need to install any software?

No. The tools work directly in a modern web browser on desktop computers, tablets and smartphones.

Is my data sent to AppErgo?

No. Data used by tools that run in your browser is not sent to the AppErgo server.

What types of tools are available?

The collection includes tools for text, codes, dates, time, random selections, games, web development, images, fitness, music, conversions and security.

Will more tools be added?

Yes. The collection is regularly expanded with new tools and improvements to existing ones.