Writes and maintains the guides and glossary for Utility Mule
Utility Mule editorial team
The people at Idea Incubator, LLC who build the tools on this site also write the guides that explain them. Each guide starts from a real file problem and ends with a tool we’ve built and checked for that job.
How we work
Guides explain why a file is misbehaving before they explain the fix, say plainly what a fix costs, and end with a tool on this site that has been checked for that job. Every guide shows the date it was last updated.
- How we write our guides: where topics come from and what each guide is checked for
- How we test our tools: the output checks behind the tools the guides recommend
- About Utility Mule: who runs the site and the rules it holds itself to
Corrections
Found a mistake? Email [email protected] with the page address and what’s wrong, or use the contact page. Factual corrections are made and the guide’s date updated.
Guides by Utility Mule editorial team (66)
Images
- Do QR codes expire?
- How to add a border to a photo without cropping it
- How to copy text from a screenshot or image
- How to crop a photo to an exact size or ratio
- How to embed an image in HTML or CSS with Base64
- How to find the hex code of a color in an image
- How to make a favicon for your website
- How to make a QR code for a link
- How to make a round profile picture
- How to make a scanned PDF searchable
- How to make an image 300 DPI
- How to make an image background transparent
- How to put a QR code on a business card
- How to put two photos side by side
- How to reduce image size without losing visible quality
- How to remove the background from a photo
- How to resize an image for a website
- How to scan a QR code from a screenshot
- How to share your WiFi with a QR code
- How to watermark your photos
- Is this QR code safe to scan?
- What size should a profile picture be?
- Why are my photos sideways when I upload them?
- Why is my QR code blurry or not scanning?
- Your photo is too large to email
Convert
- How to add page numbers to a PDF
- How to combine PDF files into one
- How to compress a PDF for email or an upload limit
- How to convert a PDF to JPG on a phone
- How to delete a page from a PDF
- How to extract pages from a PDF
- How to get images out of a PDF
- How to make a PDF from photos on an iPhone
- How to rearrange pages in a PDF
- How to rotate a PDF permanently
- How to save a PDF page as a PNG image
- How to sign a PDF without printing it
- How to watermark a PDF
- Prepare documents for an online application
- Why can’t I copy text from a PDF?
- Why won't my PDF get smaller?
Files
- Combine CSV files without repeating headers
- CSV vs Excel: what is the difference?
- How to convert CSV to JSON
- How to fix invalid JSON
- How to open a JSON file in Excel
- How to open a zip file on a phone or Chromebook
- How to open an .xls or .xlsx file without Excel
- How to remove duplicate rows from a CSV
- How to send a folder by email
- How to split a large CSV file
- How to verify a file checksum
- Renamed a file and now it’ll not open?
- What is a file extension?
- Why does my CSV show strange characters?
- Why Excel removes leading zeros from your data
- Why won’t a website accept my photo?
Privacy
General
Reference pages
Image conversions (9)
Compress to a file size (7)
QR code types (7)
Glossary (39)
- Aspect ratio
- AVIF
- Base64
- BMP
- Character encoding
- CSV
- Delimiter
- DPI
- Electronic signature
- EXIF
- File extension
- File hash
- File signature
- GIF
- HEIC
- Hex color code
- ICO
- Image orientation
- JPEG
- JSON
- Lossless compression
- Lossy compression
- Metadata
- MIME type
- OCR
- Pixel
- PNG
- QR code
- Raster image
- Redaction
- SVG
- Text layer
- Transparency
- Vector graphics
- Watermark
- WebP
- XLSX
- ZIP