Pro Calculators and Guides
How to Flip or Mirror a Photo (and Fix Reversed Selfies)
Mirror a picture left to right, flip it upside down or rotate by 90 degrees, then save as PNG or JPG at full size.
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Pro Calculators and Guides
Specialist calculators are only useful when you understand the rules behind the numbers. These guides explain what each professional calculator does, which inputs matter, how to read the result and where the official rules come from, covering payroll and tax, immigration and visas, housing, business compliance, engineering and science. Every guide links to a free tool that runs in your browser and keeps your figures private.
318 guides
Pro Calculators and Guides
How to Format, Indent and Minify XML and Check That It Is Well-Formed
Make XML readable with indentation, remove spaces to minify, and get a clear error if a tag is not closed properly.
Pro Calculators and Guides
How to Generate Random Bangladeshi and English Names for Testing and Writing
Create lists of made-up Bangladeshi male, female or English names for test data, stories, games and mock-ups.
Pro Calculators and Guides
How to Generate Random Numbers for Raffles, Games and Sampling
Draw one or many random numbers between a minimum and a maximum, with or without repeats, for fair choices.
Pro Calculators and Guides
How to Have Your Text Read Aloud With Text to Speech (Voices, Speed and Pitch)
Listen to any text read out loud using the voices already on your device. Choose a voice, speed and pitch. Nothing is uploaded.
Pro Calculators and Guides
How to Make a Bar, Line or Pie Chart and Download It as a Picture
Type labels and numbers, choose a chart type, add a title and download a PNG for reports, slides and posts. Supports up to twenty items.
Pro Calculators and Guides
How to Compare Two Pictures With a Before and After Slider
Show the difference between two images by dragging a slider. Good for retouching, renovation, design changes and edits.
Pro Calculators and Guides
How to Make a Printable Calendar for Any Year or Month, in English or Bangla
Create a twelve-page year calendar or a single month as a PDF, with Sunday or Monday start, English or Bangla names and a short note.
Pro Calculators and Guides
How to Make a Screenshot Look Professional With a Gradient and Window Frame
Put a screenshot on a gradient background with padding, rounded corners and an optional window bar. Ideal for blog posts, docs and social media.