Guides
Longer, plain-language articles on the formats these tools work with — what they are, when to use them, and the traps worth knowing. Written from building the converters themselves.
Image formats explained
JPG, PNG, WEBP, HEIC and SVG — how they differ and when to use each.
Optimizing images for the web
Right-sizing, format choice and lazy loading for faster pages.
Why iPhone HEIC photos won’t open
What HEIC is, why it causes trouble, and how to convert it.
What your photos reveal
EXIF, GPS and metadata — and how to check or strip them.
File compression explained
ZIP, GZIP, lossy and lossless, and why some files barely shrink.
CSV, XLSX and JSON
Moving data between spreadsheets and code without mangling it.
Working with PDFs
Merging, splitting, extracting text and converting pages.
Choosing a document format
DOCX, PDF, TXT and HTML — editing versus distribution.
Subtitle formats explained
SRT, WebVTT and how captions actually work.
How QR codes work
Structure, error correction, and static vs dynamic codes.