Guides
Step by step guides for converting PDF, Word, Markdown and EPUB files, optimising images, extracting audio, and using JSON, Base64, hash and QR code tools.
Documents
- How to Convert a PDF to a Word Document (DOCX)
Turn a PDF into an editable DOCX file in four steps, and learn what carries over, what does not, and how to fix the common problems. - How to Convert a Word Document (DOCX) to PDF
Save a Word document as a PDF you can share or print, with notes on how the conversion works and which Word features may look different. - How to Convert Markdown to PDF, DOCX or HTML
Publish Markdown notes, READMEs and documentation as a clean PDF, Word file or HTML page, with tips for writing Markdown that converts well. - How to Convert a PDF to EPUB (and EPUB to PDF)
Make a PDF easier to read on an e-reader by converting it to EPUB, or turn an EPUB book back into a PDF. What works, what does not, and why.
Images
- PNG vs JPG vs WebP: Which Image Format Should You Use?
A plain comparison of PNG, JPG and WebP, plus BMP, TIFF and GIF, with clear advice on which to choose and how to convert between them. - How to Compress and Resize Images for the Web
Make images smaller without making them look worse: the right quality setting, the right width, the right format, and how to batch the whole job. - How to Make an Animated GIF from Images
Combine two or more pictures into a looping animated GIF, control the speed and the order of the frames, and keep the file small.
Media
- How to Extract Audio from a Video (MP4 to MP3)
Pull the soundtrack out of a video as an MP3, WAV, M4A, FLAC or OGG file, choose the right bitrate, and convert video formats too. - MP3 vs WAV vs FLAC vs M4A vs OGG: Audio Formats Compared
How the five common audio formats differ in quality, file size and compatibility, and which one to pick for music, podcasts and archiving.
Dev utilities
- How to Convert Between JSON, YAML and CSV
Convert data between JSON, YAML and CSV, understand when each format fits, and fix the usual errors when a conversion fails. - Base64 Encoding Explained: How to Encode and Decode Text
What Base64 is, why it exists, why it is not encryption, and how to encode or decode text quickly. - MD5 vs SHA-256: How to Hash Text and Check a File Checksum
What a hash is, how MD5, SHA-1, SHA-256 and SHA-512 differ, and how to verify that a downloaded file has not been changed or corrupted. - How to Make a QR Code for a Link, Text or Wi-Fi Details
Create a QR code in seconds, learn how to make it scan reliably on print and screens, and avoid the mistakes that cause failed scans.