Blog
Step-by-step guides on converting photos and PDFs, checking foreign prices and calculating VAT, with every task doable in your browser.
- How to convert iPhone HEIC photos to JPG without uploading them – Why HEIC photos fail to open, how to choose between JPG and PNG, how to convert in your browser, and how to remove location data.
- Converting a foreign price: what the number really means – Why a converted price differs from your statement, how fees and rate dates matter, and how to check the full total before you pay.
- How to calculate 10% VAT both ways – Two VAT formulas, adding VAT to a supply price and splitting it out of a VAT-inclusive total, with worked examples and common mistakes.
- How to compress photos to a target file size – Compare choosing a quality setting with aiming for a target size such as under 300KB, and how to check the result before you share it.
- How to resize and convert photos in bulk without uploading them – The difference between max size, percentage and exact dimensions, and how to convert many photos to JPG, PNG or WebP in one go.
- How to see and remove location data (EXIF) from photos – What hidden GPS coordinates and device details are in a photo, how to check and remove them before sharing, and what is not removed.
- How to create a favicon and app icons from one image – How to create favicon.ico, PNG icons, a web manifest and the HTML tags in one step, and how to add them to a website.
- How to merge, split and reorder PDF pages without uploading them – Merge PDFs, delete, rotate or reorder pages, and extract ranges, all in your browser, with the limits you should know.
- How to convert PDF pages to PNG or JPG images – How to choose the DPI (resolution), when to pick PNG or JPG, and how to convert only the pages you need into a ZIP file.
- How to measure your typing speed and accuracy properly – The difference between typing speed and WPM, why accuracy matters as much, and how to practise so the numbers mean something.
- Using a full-screen desk clock with a D-Day countdown – Using a full-screen clock on a tablet or second monitor, setting D-Day countdowns for exams or deadlines, and keeping the screen awake.
- The pomodoro technique: focus in 25-minute blocks – How the pomodoro technique alternates 25 minutes of focus with short breaks, how to pair it with a task list, and how to set up the timer.
- Equal payment vs. equal principal: which loan repayment costs less – How the monthly payment and total interest differ between the two repayment methods, with the formulas and worked examples.
- How savings interest is calculated and how much tax is taken – The difference between simple and monthly compound interest, how the 15.4 percent interest tax applies, and how to work out a monthly target.
- How to calculate your average purchase price – How to work out a quantity-weighted average price and the return against today’s price, and why this is a calculation rather than investment advice.
- Why 30% and 10% off is not 40% off – Why adding discount rates gives the wrong answer, how to multiply stacked discounts correctly, and what to check when coupons and points apply.
- How to split a shared bill fairly among friends – Rounding each share to a unit, who covers the remainder when the total does not divide evenly, and what to check before sending money.