How to Compress a PDF for Email (Without Ruining It)
Your PDF is too big to send? Here is why PDFs get heavy, which compression level to pick, and how to get under 25 MB, 10 MB or even 1 MB.
Guides & tips
Short, practical how-tos for everyday file problems — written by the people who build the tools.
Image
HEIC to JPG: How to Open and Convert iPhone Photos Anywhere
Why your iPhone saves photos as HEIC, why Windows and websites refuse them, and the quickest ways to convert HEIC to JPG — on PC, Mac or phone.
How to Sign a PDF Without Printing It
Stop printing, signing and scanning. Sign a PDF in a minute by drawing, typing or uploading your signature — on a computer or a phone.
Image
How to Reduce a Photo to 100 KB, 50 KB or 20 KB for Forms
Portals often reject photos over 100 KB or 50 KB. Learn what controls image file size and how to hit an exact limit without a blurry result.
Data
CSV to JSON: A Practical Guide (With the Traps to Avoid)
How CSV maps to JSON, what happens to numbers, empty cells and leading zeros, and how to convert spreadsheets to clean JSON in seconds.
Media
How to Extract Audio From a Video and Save It as MP3
Turn a video into an MP3 in a few clicks. Which bitrate to choose, how to keep only the part you need, and how to make a ringtone from a clip.