Filenary Blog
Practical, no-nonsense guides for converting, compressing and protecting your files — all processed right in your browser.
How to Compress a PDF File (Without Losing Text Quality)
Email attachment limits and slow uploads usually come down to one thing: an oversized PDF. Here's what actually shrinks it.
Why iPhone Photos Won't Open on Windows (and How to Fix It)
If a photo from your iPhone shows up as a broken icon on Windows or Android, this is why — and the fix takes ten seconds.
How to Combine Multiple PDFs Into One File
Stop sending five separate PDF attachments. Here's how to combine them into one clean file.
How to Extract Audio (MP3) From a Video File
Need just the audio from a video? Here's how to extract it as MP3 without installing anything.
How to Turn Photos or Scanned Pages Into a PDF
Whether it's a scanned form or a photo of a receipt, here's how to turn images into a real PDF.
Why Browser-Based File Conversion Is Safer Than Uploading to a Server
Every 'free online converter' works the same way: your file goes up to a server first. Here's why that's the part worth questioning.
Converting CSV to JSON (and Back) Without a Spreadsheet App
Pulling a CSV export into an API, or turning JSON into something a spreadsheet can open — here's the quick way.
How to Generate a Genuinely Strong, Random Password
'P@ssword123' passes most strength meters and gets cracked in seconds. Here's what real randomness looks like.
QR Codes Can Be Malicious — How to Check One Safely First
That QR code on a parking meter or restaurant table isn't automatically trustworthy. Here's how to check it first.
When You Actually Need to Convert Markdown to HTML
Written something in Markdown but the platform only takes HTML? Here's the safe way to convert it.
How to Send Large Files by Email (Beating Every Provider's Limit)
Every mail service has an attachment ceiling, and every one of them calls it 'generous'. Here is what actually fits, what to compress, and how.
The WhatsApp Video Size Limit — and How to Send Longer Videos
WhatsApp shrinks your beautiful 4K clip before you notice — unless you run into the hard size caps. Here are the real numbers and the clean workaround.
Turn Phone Photos of Documents into a Clean PDF
The one workflow that never dies: photograph pages, merge into a PDF, upload. Here is how to do it so the result looks like a scanner made it.
CV and Passport Photo Sizes: The Country-by-Country Cheat Sheet
The photo that's perfect for your CV is the wrong size for a German passport and technically illegal for an Indian visa. Here are the actual numbers.
WebP vs JPG: Which Format Should Your Site Actually Use?
The honest answer to 'WebP or JPG' changed in 2020 and again in 2023. Here is the decision table for websites, emails and downloads.
How to Reduce Image Size Without Losing Quality
'Reduce image size' means three different things. Fix them in the right order and you can hit 100 KB without ever seeing a quality loss.
How to Open HEIC Photos on Windows (iPhone Format, Explained)
Your iPhone saves photos as HEIC to halve the file size; Windows cannot decode that container out of the box. Here is what each fix actually costs you.
How to Make a Photo Under 1 MB for Any Upload Form
Portals ask for 'maximum 1 MB' and a camera photo arrives at 4 MB. Three moves in the right order and the file fits while the photo still looks like a photo.
Passport Photo Sizes by Country (US 2x2 in, ICAO 35x45 mm, TR 45x60 mm)
Almost every ID photo rule reduces to two geometries: the American 2x2 inch square and the ICAO 35x45 mm portrait. Turkey adds 45x60 mm.