File & image how-to guides

Short, practical answers to the file problems behind our tools.

• How to Combine Documents Into One PDF (Free) Turn a pile of scans, photos, and PDFs into one clean file for a job, visa, or expense report. Free browser tools, no upload, no watermark.
• How to Reduce Photo Size for Email (2026) Why phone photos bounce email limits, what size to aim for (500 KB to 1 MB), and how to compress a whole batch in your browser without uploading anything.
• iPhone Photos Won't Open on Windows? HEIC, Explained Why iPhone photos arrive as HEIC files Windows can't open, three fixes ranked by effort, and when it's actually worth keeping HEIC.
• WebP vs JPG: Which Should You Use in 2026? WebP files run 25-35% smaller than JPG at the same quality, but JPG still wins on compatibility. Where each format belongs, with a comparison table.