Guides
Practical answers to the questions people actually have about compression, PDFs and file conversion — not padded, not generic.
Image Compression
JPEG vs PNG vs WebP
A practical answer, not a format spec dump: which of JPEG, PNG and WebP to use for photos, screenshots, logos and transparency — and why.
Why Compression Hurts Quality
Blocky edges, muddy color, blurry text — what actually causes visible compression damage, and the settings that prevent it.
Image Size for Social Media
File size and dimension guidance for Instagram, LinkedIn, X, Facebook and email — and why "just make it small" is the wrong instinct.
Passport Photo Size Requirements
Exact photo dimensions and file-size limits for US, UK, Schengen, India and Canadian passport and visa applications, and how to hit them precisely.
Exam Form Photo & Signature Size
Why exam-form photo and signature uploads keep getting rejected, and how to hit an exact KB range for both instead of guessing at a quality slider.
Resume Photo Size
When a resume photo is expected (and when to skip it), why a bloated headshot slows down applicant tracking systems, and the right size to target.
Lossy vs Lossless
What "lossy" and "lossless" really mean at the byte level, which formats use which, and how to pick correctly for photos versus diagrams.
PDF Tools
Why Is My PDF So Big?
Uncompressed scan images, embedded fonts, duplicate resources and more — the actual reasons a PDF bloats, and which ones compression can fix.
Compress PDF for Email
Gmail, Outlook, Yahoo and iCloud Mail's real attachment limits, what happens when you exceed them, and the target size to aim for.
Scanned vs Text PDF
The structural difference between a PDF built from real text and one built from a photographed page, and why it changes everything about compression.
Combine Scanned Pages Into One PDF
Your phone's scanner app saves each page as a separate file — how to combine them into a single ordered PDF without emailing them to yourself one by one.
Split a PDF by Chapter
How to find chapter boundaries in a PDF without manually scrolling and counting, then split it into per-chapter files in one pass.
Fix a Sideways-Scanned PDF
Why scanners and phone cameras produce sideways pages in the first place, and how to correct the rotation without rescanning the document.
Document Conversion
PDF to Word Formatting Issues
PDF doesn't store tables, columns, or paragraphs the way Word does — what conversion tools are actually reconstructing, and why it sometimes goes wrong.
"Export to PDF" vs "Print to PDF"
Two ways to make a PDF from the same document that can produce very different files — what each one keeps, drops, or breaks, and when to use which.
What Is PDF/A?
PDF/A is an archival standard, not just 'a fancier PDF' — what it actually restricts, who requires it, and how to tell if a form is asking for it.