Daily Usage Tool — Free Online Tools for Images, Students & Work

Start with a featured tool

The tools people reach for most — pick one up and get a result in seconds.

Image Batch Image Compressor Shrink JPG, PNG and WebP file sizes without losing visible quality.

Image Batch Image Resizer Resize many images at once by pixels or percentage.

Image JPG / PNG / WebP Converter Convert images between JPG, PNG and WebP formats.

Student GPA Calculator Calculate your grade point average on a 4.0 scale.

Student Final Grade Calculator Find the score you need on your final exam.

Work & Salary Time Card Calculator Add up daily and weekly hours from clock-in and clock-out times.

Work & Salary Time-to-Decimal Converter Convert hours and minutes into accurate decimal hours.

Three toolkits, one destination

Every tool on Daily Usage Tool belongs to a focused category, so you can go straight to what you need instead of digging through a generic list.

Image Tools Compress, resize, convert, crop and clean up photos in your browser. 5 free tools

Student Tools GPA, grade and fraction calculators built for US grading scales. 5 free tools

Work & Salary Tools Time cards, clock-out times, decimal hours, salary and billable rates. 5 free tools

Why Daily Usage Tool

Built to be useful, not flashy

Fast, focused tools

Every calculator and image tool is built to do one job well. There is no bloated dashboard to learn — open a tool and get your result in a few clicks.

No account required

You can use every tool on this site without registering, verifying an email, or handing over personal information. Open the page and start working.

Privacy-conscious by design

Image tools run locally in your browser using the File API and Canvas, so your photos are not uploaded to a server just to be compressed, resized, or converted.

Works on any device

The layout adapts from a small phone screen to a large desktop monitor, so the same tool works whether you are on a break room phone or an office workstation.

Privacy-first processing

Your files stay on your device

The image tools on Daily Usage Tool — the compressor, resizer, converter, cropper, and metadata remover — process your photos locally in your browser using the File API and HTML Canvas. The image data never leaves your device to reach our servers, so there is nothing to upload and nothing for us to store.

Compression, resizing, cropping and format conversion all happen in-browser.
Metadata (EXIF, GPS, camera info) is read and removed on your device.
Closing the tab clears any temporary image data your browser was holding.

How it works

Three steps, no learning curve

01

Pick a tool

Choose from Image, Student, or Work & Salary tools using the navigation menu, the homepage directory, or the search box.

02

Enter your input

Type in numbers, times or grades, or upload an image. Every field is validated as you go, so mistakes are caught immediately.

03

Get an instant result

Results calculate the moment you submit — no page reload, no waiting on a server, and no account required to see the answer.

Popular use cases

Real situations these tools solve

Checking a semester GPA before finals

A student enters this semester’s courses and credit hours into the GPA calculator, then uses the final grade calculator to see what score they need on each exam.

GPA Calculator Final Grade Calc

Preparing product photos for an online store

A seller resizes a batch of product photos to a consistent size, compresses them for faster page loads, and strips location metadata before publishing.

Image Resizer Image Compressor Metadata Remover

Double-checking a weekly paycheck

An hourly employee logs their clock-in and clock-out times for the week, converts the total into decimal hours, and compares it against their pay stub.

Time Card Calc Time-Decimal Converter

Turning a job offer into an hourly rate

Someone comparing a salaried offer to their current hourly job converts the annual salary into an hourly, weekly and monthly equivalent.

Salary-Hourly Calc Billable Hours Calc

From the blog

Guides worth reading

View all posts

Work & Salary 2 min read

Salary vs. Hourly: How to Convert Your Pay Rate

How to turn an annual salary into an hourly rate (and back), with the assumptions worth double-checking before you compare two job offers.

September 9, 2026

Work & Salary 2 min read

Why 30 Minutes Isn't .30: A Guide to Decimal Time for Payroll

The most common payroll math mistake, why it happens, and the correct way to convert hours and minutes to decimal time.

September 2, 2026

Student 2 min read

A Student's Guide to Weighted Grades

How weighted grading actually works, why your grade isn't just an average of your scores, and how to check your own math.

August 27, 2026

Full directory

All 15 tools, grouped by category

Browse everything at once, or search to jump straight to a tool.

Image Tools

Student Tools

Work & Salary Tools

What Daily Usage Tool is for

Daily Usage Tool is a collection of 15 focused, free online tools split across three categories: image tools, student calculators, and work & salary calculators. Instead of building one large, complicated application, each tool is designed to answer one specific question well — how much GPA will this course change, what time should I clock out, how much smaller can this photo get without looking worse.

Who uses these tools

High school and college students use the GPA, final grade, weighted grade, test grade and fraction calculators to plan coursework and check their standing before report cards or finals. Hourly employees, freelancers, and small business owners use the time card, clock-out, time-to-decimal, salary-to-hourly and billable hours calculators to verify pay and build invoices. Online sellers, bloggers, and anyone preparing images for the web use the image compressor, resizer, converter, cropper, and metadata tools to get files ready to upload or share.

Why the image tools run in your browser

Compressing or resizing a photo does not require sending it to a remote server — a modern browser can decode an image, draw it to a canvas, and re-encode it locally. Daily Usage Tool's image tools take that approach: files are read with the browser's File API, processed with HTML Canvas, and made available for download without ever being transmitted anywhere. That keeps the tools fast, keeps your files private, and avoids upload limits tied to file size or connection speed.

How accurate the calculators are

Every calculator on this site uses standard, documented formulas — a 4.0 GPA scale, the standard weighted-average formula, decimal-hour conversion based on exact minutes, and so on. Where a formula depends on an assumption (for example, 40 hours per week for a salary conversion), that assumption is shown and editable rather than hidden. The calculators are meant for planning and verification; for decisions that matter — like a grade dispute or a payroll discrepancy — always confirm the result against your school's official policy or your employer's payroll system.

Free for students and professionals

Every tool on Daily Usage Tool is free to use, with no account, subscription, or watermark. The site is supported by advertising rather than fees, so students and professionals in the United States and elsewhere can use the full toolset without paying for access.

Frequently Asked Questions

Are Daily Usage Tool tools actually free?

Yes. Every tool — all 15 of them — is free to use with no subscription, watermark, or usage limit. The site is supported by advertising rather than paid accounts.

Do I need to create an account?

No. None of the tools require sign-up, email verification, or a password. Open a tool page and start using it right away.

Are my uploaded images stored on your servers?

No. The image tools (compressor, resizer, converter, cropper, and metadata viewer/remover) process files locally in your browser using the File API and Canvas. Your images are never uploaded to a server as part of using these tools.

Can I use the tools on my phone?

Yes. Every tool is built mobile-first and works on phones, tablets, laptops and desktops. Image tools rely on standard browser APIs that are supported by current versions of Chrome, Safari, Firefox and Edge on mobile.

Which image formats are supported?

The image tools support JPG/JPEG, PNG and WebP for upload, compression, resizing, cropping, and conversion between those three formats.

How accurate are the calculators?

The calculators use standard, documented formulas (a 4.0 GPA scale, standard weighted-average math, exact decimal-hour conversion, and so on). For decisions that matter, such as a grade dispute or a payroll discrepancy, always confirm the result against your school’s official policy or your employer’s payroll system — see each tool’s disclaimer for details.

Can students use the calculators for school assignments?

Yes. The GPA, final grade, weighted grade, test grade, and fraction calculators are built around common US high school and college grading conventions and show their formulas, which makes them useful both for getting an answer and for checking your own work.

Can freelancers and small businesses use the work and salary calculators?

Yes. The time card, clock-out, time-to-decimal, salary-to-hourly, and billable hours calculators are designed for hourly employees, freelancers, and small business owners who need to check hours or build an invoice. They provide informational estimates, not tax, payroll, or legal advice.

Is Daily Usage Tool built for users in the United States?

Yes. The tools use US conventions by default — a 4.0 GPA scale, 12-hour AM/PM time entry, and USD for salary and billable-hours calculations — while remaining usable for anyone who wants a straightforward calculator or image tool.

How often are new tools added?

Daily Usage Tool launched with 15 tools across image, student, and work & salary categories, and more tools are added over time based on what people search for and ask about.

Everyday Tools. Smarter Results.