Blog
Why an iPhone photo will not open on Windows, how to get a PDF under a size limit, why a video plays sideways. Articles on the formats and mechanics behind everyday file jobs, each pointing to the tool that does it.
- What OCR can and cannot read: getting usable text out of a screenshot or scanTesseract reads clean printed text at 99 % and handwriting at roughly 0 %. What decides the result — resolution, contrast, language model, layout — and how to prepare an image so the text comes out right.
- Removing a photo background in the browser: what the model is, why the GPU matters, and where it failsA 44 MB neural network runs on your own machine to cut out the subject. Under a second on a laptop GPU, 15–25 seconds on the CPU. What ISNet is, why nothing is uploaded, and the kinds of photos it gets wrong.
- What is HEIC, and why won't my iPhone photos open on Windows?Where the .heic format came from, why Apple switched to it, what actually breaks when you send one to a PC, and the three ways to get a JPG out of it.
- JPG, PNG, WebP or AVIF: which image format to use, with measured sizesThe same two photos encoded to equal visual quality in four formats. AVIF came out 40–45 % smaller than JPEG; WebP did not. When each format is the right choice, and when a PNG is a mistake.
- Why your video plays sideways, and why fixing it takes half a secondPhone cameras always record landscape and write an 11-byte note telling the player to rotate. When that note is lost, the video lies down. Here is what the note is, who drops it, and why the fix does not touch a single pixel.
- File size limits for e-mail, WhatsApp, Telegram, Discord and the rest (checked September 2026)One table of what each service will actually accept, the difference between sending a video 'as media' and 'as a document', and which limit to aim for when you compress.
