FileKitBlog
Practical guides for working with files.
- ·5 min read
How to Compress a PDF Without Losing Quality
A practical guide to reducing PDF file size — covering browser tools, what actually makes PDFs large, and tips for getting the smallest file without degrading readability.
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- ·6 min read
WebP vs PNG vs JPG — Which Format Should You Use?
A no-fluff comparison of the three most common image formats. Learn when each format wins, typical file size differences, and how to convert between them in seconds.
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- ·4 min read
How to Merge PDF Files — 3 Free Methods
Learn how to combine multiple PDFs into one document using browser tools, macOS Preview, and command-line utilities. Covers page order, file size, and common pitfalls.
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- ·4 min read
How to Add Page Numbers to a PDF
A guide to adding page numbers to existing PDF files — covering position, format, skipping pages, and tools from browser-based to Acrobat.
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- ·5 min read
How to Add a Watermark to a PDF
When and how to watermark PDF documents — covering layout options (diagonal, center, tiled), opacity, colour, and privacy-safe browser tools.
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- ·5 min read
How to Convert HEIC to JPG Without Losing Quality
Why iPhones use HEIC, where it breaks, and how to convert to JPG or PNG using browser tools, macOS, iPhone settings, and command-line utilities.
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- ·6 min read
How to Extract Text from a PDF (Text-Based and Scanned)
Two approaches for two kinds of PDFs: direct text extraction for digital PDFs, and OCR for scanned documents. Covers browser tools, command-line, and common problems.
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- ·7 min read
How to Compress Images for the Web — A Complete Guide
Everything you need to know about image compression for websites: lossy vs lossless, format selection, quality settings, resizing, and performance best practices.
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- ·4 min read
How to Split a PDF into Separate Files
A guide to extracting pages from a PDF — covering browser tools, macOS Preview, command-line utilities, and tips for getting clean splits.
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- ·4 min read
How to Convert PDF Pages to Images (JPG or PNG)
Methods for turning PDF pages into images — covering DPI settings, format choice (JPG vs PNG), and tools from browser-based to command line.
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- ·5 min read
How to Sign a PDF Online Without Printing
Three approaches to PDF signing — visual signature overlay, Apple device built-ins, and certified digital signatures. Covers privacy, legality, and best practices.
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- ·4 min read
How to Protect a PDF with a Password
A guide to password-protecting PDFs — covering AES-256 encryption, browser-based tools, Adobe Acrobat, macOS Preview, and password best practices.
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- ·4 min read
How to Convert Images to PDF — Combine Photos into One Document
How to create a single PDF from multiple images — covering page size options, format considerations, and tools from browser-based to command line.
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- ·4 min read
How to Remove Pages from a PDF
Methods for deleting unwanted pages from PDF files — covering page-number input, visual page management, and important considerations for sensitive content.
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- ·5 min read
How to OCR Scanned Documents — Extract Text from Images
A guide to Optical Character Recognition: what it is, how to use browser-based OCR, tips for better accuracy, and when to use OCR vs. direct text extraction.
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- ·4 min read
How to Rotate PDF Pages — Fix Sideways and Upside-Down Pages
Methods for rotating PDF pages — covering browser tools, macOS Preview, command line, and how PDF rotation actually works under the hood.
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- ·4 min read
How to Flatten a PDF — Lock Forms, Signatures, and Annotations
What flattening means, when to do it, and how — covering browser tools, Acrobat, and command line. Includes important considerations about irreversibility.
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- ·4 min read
How to Redact a PDF — Permanently Remove Sensitive Information
The difference between covering and true redaction, when to use it, and how to avoid common mistakes that leave sensitive data exposed.
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- ·4 min read
How to Crop PDF Pages — Remove Margins and Trim Marks
Methods for cropping PDF pages, understanding MediaBox vs CropBox, and use cases from removing margins to trimming printer marks.
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- ·4 min read
How to Convert Text to PDF — From Plain Text to Formatted Document
Methods for converting .txt files to well-formatted PDFs — covering browser tools, word processors, command line, and formatting best practices.
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- ·5 min read
How to Compress a PDF to Under 1 MB
Practical methods for shrinking a PDF to meet 1 MB upload limits — covering browser tools, DPI reduction, splitting, and what to do when compression is not enough.
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- ·5 min read
How to Compress a PDF for Email — Stay Under the Attachment Limit
How to shrink a PDF to fit within Gmail, Outlook, and corporate email attachment limits. Covers compression, page removal, splitting, and best practices.
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- ·4 min read
How to Reduce PDF Size on iPhone — 3 Methods
Methods for compressing PDFs directly on your iPhone — using Safari browser tools, iOS Shortcuts, and scanning tips for smaller files.
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- ·5 min read
How to Reduce PDF Size on Mac — Preview, Browser, and Command Line
Four methods for compressing PDFs on macOS — Preview built-in filter, browser tools, custom Quartz filters, and Ghostscript command line.
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- ·5 min read
How to Convert HEIC to JPG on Windows — 4 Methods
Why Windows cannot open HEIC files and how to convert them to JPG — covering browser tools, Windows Photos, iPhone settings, and ImageMagick.
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