Blog
Practical guides on file conversion, developer tools, and data privacy.
How to Merge PDF Files Online for Free (Without Uploading Them Anywhere)
Most PDF mergers upload your files to a server you've never heard of. Here's how to combine PDFs entirely in your browser instead.
What Is a JWT, and How Do You Decode One Safely?
A practical guide to JWT structure — and why pasting a production token into a random online decoder is riskier than it looks.
Why Online File Converters That Upload Your Files Are a Privacy Risk
Most free converters send your file to a server before giving you a result. Here's what can actually go wrong — and how to avoid it.
What Data Does an AI Chat Feature Actually Need From Your File?
Asking an AI questions about your data doesn't require sending it your whole file. Here's what actually gets transmitted — and what doesn't.
What Is a UUID v4, and When Should You Use One?
UUIDs show up everywhere in software — database keys, session IDs, request tracing. Here's what version 4 actually means.
How to Split a PDF Into Separate Files (Without Installing Anything)
Need to break one PDF into multiple files, or pull out just a few pages? Here's how to do it entirely in your browser.
JSON to YAML: When and Why You'd Need to Convert
YAML and JSON represent the same data differently. Here's when you'll actually need to convert between them.
How to Remove Duplicate Rows From a CSV File
Duplicate rows quietly skew totals and counts. Here's how to find and remove them from a CSV file in seconds.
How to Convert JSON to CSV (and Back) Without Losing Data Types
Converting between JSON and CSV is simple — until nested objects and data types get involved. Here's what actually happens.
CSV vs Excel: Which File Format Should You Actually Use?
CSV and Excel solve different problems. Here's how to pick the right one for your data — and convert between them in seconds.