PDF Guides & Tutorials
Original, practical, fact-checked guides for working with PDF files. Written by humans, not mass-produced. Updated regularly.
PDF Compression
How to Compress a PDF Online
Compressing a PDF reduces its file size so it fits inside email attachments, uploads faster to web forms, and takes up less storage on your device. This guide explains what PDF compression actually does, when you should use it, and how to compress a PDF for free in your browser without giving up your privacy.
How to Reduce PDF File Size
Large PDFs are a daily annoyance — they bounce from email servers, fail web-form uploads, and clog up cloud storage. This guide walks through five reliable methods to reduce PDF file size, ranked from easiest to most technical, so you can pick the one that fits your situation.
How to Reduce PDF Size for Email
Email providers limit attachment sizes — typically 25 MB for Gmail and Outlook, sometimes less for business accounts. This guide shows you how to get any PDF under the limit, plus what to do when compression alone isn't enough.
How to Compress PDF on Android
Android users have several free options for compressing PDFs, from browser-based tools to Google Drive to dedicated PDF apps. This guide covers the three best methods with clear step-by-step instructions.
How to Make a PDF Smaller
Making a PDF smaller is essential for email attachments, web uploads, and storage. This guide covers eight proven methods, from quick compression to advanced optimization techniques, so you can pick the one that fits your situation.
How to Compress PDF to 100KB
Many online forms — job applications, government portals, university admissions — require PDF files under 100KB. This guide shows you exactly how to compress a PDF to 100KB or smaller without losing readability, using a free browser-based tool that works in USA, UK, Pakistan, and India.
How to Compress PDF to 1MB
Email providers like Gmail and Outlook allow attachments up to 25MB, but many web forms and portals have much lower limits — often 1MB or 2MB. This guide shows you how to compress a PDF to 1MB or smaller for email attachments, online forms, and document sharing.
How to Compress PDF on iPhone
iPhone users can compress PDF files without installing any app — just open Safari and use a free browser-based compressor. This guide covers the best methods for compressing PDFs on iPhone and iPad, with tips for hitting specific file size targets.
How to Compress PDF on Android
Android users can compress PDF files for free without installing any app — just open Chrome and use a browser-based compressor. This guide covers the best methods for compressing PDFs on Android phones and tablets, with tips for specific file size targets.
Best Free PDF Compressor in 2025
Looking for the best free PDF compressor? This guide compares the top options available in 2025 — browser-based tools, desktop apps, and mobile apps — based on compression ratio, speed, privacy, and ease of use.
How to Compress PDF for Email
Email providers limit attachment sizes — Gmail and Outlook allow 25MB, but corporate email often limits to 10MB or less. This guide shows you how to compress PDFs to fit email limits, plus alternative methods for sending very large PDFs.
PDF Merging
How to Merge PDF Files
Merging PDF files combines several documents into a single, sequential PDF — perfect for assembling reports, contracts, course materials, or any project where multiple sources need to live as one file. This guide walks through the easiest free method, plus tips on ordering, page sizes, and what to do with encrypted PDFs.
How to Merge PDF Files on iPhone
iPhone users have several free options for merging PDFs, ranging from the built-in Files app to browser-based tools to dedicated apps. This guide covers the three best methods, with clear step-by-step instructions for each.
How to Merge PDF Files on Android
Need to combine multiple PDFs into one file on your Android phone? This guide shows you the best free methods — no app installation required, works in Chrome, and processes files privately on your device.
PDF Splitting
How to Split a PDF
Splitting a PDF lets you extract specific pages, break a long document into smaller files, or isolate a single page for sharing. This guide covers the three most useful split modes and when to use each one, with a free browser-based workflow that keeps your files private.
How to Extract Pages from PDF
Extracting pages from a PDF lets you pull out exactly the pages you need without sharing the entire document. This guide covers when to extract pages, how to do it for free in your browser, and how to choose which pages to extract.
Image Conversion
How to Convert JPG to PDF
Converting JPG images to PDF is the easiest way to share multiple photos as a single document, attach scanned pages to an email, or create a quick photo album. This guide walks through the simplest free method, plus tips on image order, page size, and quality.
How to Convert PDF to JPG
Converting a PDF to JPG turns each page into a standalone image file. This is useful when you need editable images for slideshows, social media posts, or thumbnails. This guide covers the conversion process, how to choose the right quality, and how to handle multi-page PDFs.
How to Convert PNG to PDF
PNG to PDF conversion lets you combine multiple PNG images into a single document, with each image placed on its own page. This guide walks through the conversion process and explains how transparency, file size, and image order affect the result.
How to Convert Images to PDF
Converting images to PDF is the easiest way to share multiple pictures as a single document, attach scanned pages to an email, or create a quick photo album. This guide covers converting JPG, PNG, and WebP images to PDF, with tips on order, quality, and page size.
How to Turn Multiple Images into One PDF
Combining multiple images into a single PDF is the easiest way to share a batch of photos, scanned pages, or screenshots as one document. This guide walks through the simplest free method, with tips on image order, page size, and mobile workflow.
How to Convert JPG to PDF on iPhone
Need to convert JPG photos to a PDF on your iPhone? This guide shows you the best free methods — no app installation required, works in Safari, and combines multiple JPGs into a single PDF.
How to Convert JPG to PDF on Android
Need to convert JPG photos to a PDF on your Android phone? This guide shows you the best free methods — no app installation required, works in Chrome, and combines multiple JPGs into a single PDF.
Document Conversion
How to Convert PDF to Word
Converting PDF to Word lets you edit text that's locked inside a PDF. This guide covers the easiest free method, what to expect in terms of formatting, and which PDFs convert well versus poorly.
How to Convert Word to PDF
Converting a Word document to PDF produces a fixed-layout file that looks identical on every device, making it ideal for sharing contracts, resumes, reports, and any document where formatting must be preserved. This guide covers three reliable methods, ranked from easiest to most flexible.
How to Convert a Document to PDF
Almost any document can be converted to PDF, but the right method depends on the source format. This guide covers converting Word, Excel, PowerPoint, plain text, RTF, and image files to PDF, with free methods for each.
PDF Rotation
Format Comparison
PDF Optimization
Image Compression
How to Compress Images Without Losing Quality
Want to reduce image file size without making the image look blurry or pixelated? This guide explains how image compression works, what settings preserve quality, and how to use a free browser-based tool to compress images by up to 90% with no visible quality loss.
How to Compress Images for WhatsApp
WhatsApp compresses images when you send them, which can reduce quality. This guide shows you how to pre-compress images for WhatsApp to control the quality and file size, and how to send images in full quality using Document mode.
Image Resizing
Calculators
How to Calculate Percentage Increase
Need to calculate percentage increase for a salary raise, price change, or growth rate? This guide explains the formula, walks through examples, and shows you how to use a free online percentage increase calculator.
How to Calculate Loan EMI
EMI (Equated Monthly Installment) is the fixed monthly payment you make on a loan. This guide explains the EMI formula, walks through examples for different loan types, and shows you how to use a free online EMI calculator.
BMI Calculator for Men and Women
Body Mass Index (BMI) is a screening tool that uses height and weight to categorize whether your weight is in a healthy range. This guide explains how BMI works for men and women, what the categories mean, and how to use a free online BMI calculator.