Short, practical guides on file sizes, formats, and getting a document past a form's requirements.
Why some merge tools quietly turn your document into a picture of itself, and how to avoid that.
PDFSplitting into pages vs. extracting as images — they solve different problems.
WebFavicons show up at 16×16 pixels. Here's how to design one that survives being shrunk that far.
WebThe .ico format, where favicons appear, and how to link one in your HTML — the complete picture.
PDFCombining a few photos into a PDF and getting 10MB+ back? Here's exactly why, and how it's fixed.
GeneralA practical checklist for why an online form keeps rejecting your file, and how to fix each cause.
GeneralRough, honest file-size expectations for scans, photo IDs, resumes, and PDFs.
GeneralHow to photograph a document so it looks like a real scan and stays a reasonable size.
PDFWhat actually makes a PDF large, and the fastest ways to shrink one without losing legibility.
ImageA plain-language breakdown of when each format wins, with real trade-offs instead of jargon.
ImageWhy these forms reject photos, and how to get a compliant file without guesswork.
ImageWhy resizing a PNG stays large, how format and quality interact, and the right settings for every situation.
ImageWebP promises smaller files than JPG and PNG — but when does it actually make sense, and when should you convert away from it?
ImageScreens and printers measure resolution completely differently. Here's how that disconnect causes blurry prints — and how to fix it.
ImageA form has a 200 KB or 500 KB limit. Here's how to hit that target without destroying the image quality.
PDFScanned each page separately? Here's how to merge them into one file — whether they're photos or individual PDFs.
ImageBoth make files smaller, but they do it in completely different ways. Knowing which to use first saves a lot of time.
GeneralDPI appears on scan settings and form instructions everywhere. Here's what it is and when it actually matters.
GeneralResume uploads get silently rejected more often than people realize. Here's what to check before you submit.
ImageiPhones save photos as HEIC by default — a format many websites still won't accept. Here's why and how to fix it.
ImageOver-compressed images look bad no matter what you do next. Here's how to spot the signs early.
PDFA4 and Letter look similar but aren't interchangeable. Here's what each means and when to choose which.
ImageNeed to resize or convert many images at once? Here's how to handle batches efficiently with no downloads required.
PDFSecure your sensitive PDF files with a password before emailing them, and remove the protection locally when it is no longer needed.
PDFLearn how to add page numbers to a PDF document offline for free. A guide to PDF page numbering formats, margins, and safe client-side tools.
PDFLearn how to add secure text watermarks like DRAFT or CONFIDENTIAL to your PDFs offline. A guide to document security, opacity, and local browser tools.
Data & DevMany online QR generators stop working after a trial period. Here is why it happens, the difference between static and dynamic codes, and how to generate permanent codes locally.
Data & DevReceived a QR code in an email or message? Learn how to scan it directly from an image file or screenshot on your device without using a separate camera.
Data & DevPasting sensitive text or corporate drafts into online counters can expose your data. Learn how to parse and count words safely and locally in your browser.