Best Video Format & Settings for Instagram (Reels, Feed)
MP4 with H.264 + AAC is the best video format for Instagram. Match its spec (9:16 1080×1920 Reels, 4:5 Feed)…
September 2026
Video Upload Limits by Platform in 2026 (and How to Fit)
Verified 2026 video upload limits for Discord, WhatsApp, YouTube, Telegram, Slack, Gmail and more — plus how to compress any…
Convert EPUB to PDF: Print, Share, or Annotate an E-Book
Convert EPUB to PDF to print, share, or annotate your e-book. See what changes when reflowable text becomes fixed pages…
Watermark a PDF Online: Draft, Confidential & Paid Stamps
Stamp DRAFT, CONFIDENTIAL or PAID across every page of a PDF online in seconds—and learn why a watermark deters copying…
How to Flatten a PDF: Forms and Annotations That Always Print
Flatten a PDF to bake form fields, annotations, and signatures into the page so they always print and can't be…
How to Rotate or Reorder PDF Pages (and Save It That Way)
Rotating a PDF in a viewer often doesn't stick. Learn to rotate 90/180 and reorder pages permanently, saved into the…
Compress a PDF to Under 1 MB for Online Portals and Forms
Need to compress a PDF under 1 MB for a portal or web form? The honest, preset-first way to hit…
PDF to JPG at 300 vs 600 DPI: What’s Best for Printing?
Should you export a PDF to JPG at 300 or 600 DPI? 300 is the print standard; 600 only helps…
Convert Stereo to Mono and Halve a Voice Recording’s Size
A voice in stereo is just two near-identical channels. Convert stereo to mono to roughly halve a voice recording's size…
VBR vs CBR: Which Audio Bitrate Mode Makes Smaller Files
VBR vs CBR: variable bitrate spends bits where the audio is complex, so at the same quality it usually makes…