Pixel ToolboxFrom stuck to solved.
Clear, practical answers to common image, PDF and QR-code problems. Understand the cause, follow the steps, then finish the job with a free browser tool.
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What to do when the photos are too heavy to send via email or LINE
We will explain everything from the difference between MB and KB to the order in which you can reduce the size of your photos without drastically reducing image quality.
Read guide↗How to read the QR code on the same smartphone screen
We will explain how to properly use screenshots, photo apps, Google Lens, and image reading tools, and how to check their safety.
Read guide↗How to combine photos of receipts and documents into one PDF
This is a procedure that reduces the number of redos, from photographing, sorting, orientation, converting to PDF, and checking capacity before submission.
Read guide↗What causes transparent parts of PNG to turn black and how to fix it properly
We will explain why transparent backgrounds change to black or white, the difference from JPEG, and the storage format that suits your purpose.
Read guide↗How to print a large poster on 4 or 6 sheets of A4 paper
We will explain the finished size, aspect ratio, how to arrange the paper, margins, and pasting in order of failure.
Read guide↗How to delete location information and EXIF from photos and share them safely
The idea is to check the location, date and time, and model information that remains in the photo and safely remove only the necessary information.
Read guide↗7 things to check when the barcode you created cannot be read
Isolate the cause in the order of standards, numbers, margins, color, size, print quality, and reading environment.
Read guide↗How many pixels do you need for A4 printing? How to think about image size and DPI
Sort out the relationship between pixels, mm, and DPI to determine the image size that is less likely to blur when printed in A4/A3.
Read guide↗How to reduce iPhone photo size | Check image quality and compress
Here are the compression steps and points to check to make it easier to send photos taken with your iPhone to email, LINE, or forms.
Read guide↗What percentage of the image should be compressed? How to determine image quality and file size
How to use 70%, 80%, and 90% specifically explains where to check and the criteria for redoing.
Read guide↗How to change the image size for email attachment | How many pixels should it be easy to see?
We will explain how to use vertical and horizontal pixels, aspect ratio, and compression to make it easier to send photos by email.
Read guide↗How to avoid distortion even if you make an image vertically or horizontally | Basics of aspect ratio
We will explain why people and logos stretch when changing the width and height, and how to choose fixation, cropping, and margins.
Read guide↗How to create a QR code from a URL for free | Checks to be performed after creation
This is a method of converting the URL of a website or form into a QR code and proceeding with saving, reading tests, and printing without making any mistakes.
Read guide↗How to make a QR code with a logo easy to read | Size and margins
We will explain why the central logo obstructs the QR code, as well as the standards for error correction, contrast, and actual device testing.
Read guide↗What size should I print the QR code? How to check business cards and flyers
These are practical steps to prevent mistakes by considering the actual size, margins, print magnification, and reading distance of the QR code.
Read guide↗How to combine multiple PDFs into one | Steps to ensure page order is correct
Combine materials, application forms, and attachments in the correct order and summarize the points to check before submission.
Read guide↗How to split a PDF page by page and save it | Extract the necessary pages
This is a method to separate a multi-page PDF into individual page files and save and check them as ZIP files in numerical order.
Read guide↗How to crop images for Instagram/Stories/X
This is the difference between 1:1, 4:5, 9:16, and 16:9, and the steps to create SNS images without cutting out faces or text.
Read guide↗How to create an ICO file for favicon from PNG/JPEG
This is how to create a small but easy-to-read original image, and the steps to create and check an ICO containing 16 to 256px.
Read guide↗How to compress, convert, and resize multiple images at once
This is a procedure for preparing, checking, and reducing mistakes when applying the same settings to many images and saving them as a ZIP file.
Read guide↗Once you know the answer, finish the job.
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