Learn
Short, honest guides. Every article links to the free browser tool that does the job.
- Every common file format, explainedPDF, DOCX, HEIC, WebP, AVIF, EPUB, and 30+ more — what they're for and when to convert.
- How to compress a PDF (without losing quality)Image re-encoding, downsampling and font subsetting — what actually shrinks a PDF.
- How to resize an image the right wayPixels vs percent, resampling, and when to use WebP or AVIF.
- OCR that actually works: a practical guideTesseract vs cloud OCR, preprocessing tricks, and cleaning up scan artefacts.
- WebP vs AVIF — which should you use?File size, browser support, encode speed — and when each format wins.
- Reduce a PDF for email attachmentsGmail 25 MB, Outlook 20 MB — how to reliably fit any PDF under the limit.
- HEIC to JPG: how to convert iPhone photosWhy Windows can't open HEIC, how to stop making them, and the fastest free ways to convert.
- How to compare two texts or strings onlineLine diffs, invisible whitespace traps, line endings and smart quotes — and how to spot them.
- How to merge PDF files for free (no upload)Combine documents in the right order, and why merged files get bigger than you expect.
- How to split a PDF or extract pagesRanges, deleting pages, single-page exports — and which tool fits each job.
- Images to PDF (and PDF back to images)Turn photos and scans into one PDF, or export every page as a PNG — both directions, offline.