Clear answers about file formats, size limits and conversions — what a form really accepts, which format to pick, and how to get there.
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Make a QR code by encoding a link, Wi-Fi login or contact as a static code, printing it at least 2 × 2 cm with a 4-module white border, and testing it on two phones first.
Jonas Weber · Oct 16, 2026 · 11 min read
Passport photo rules compared for the US, UK, EU, India, Canada, Australia, China, Japan and Germany: print size, head height, background color, glasses and baby rules.
Priya Raman · Oct 15, 2026 · 11 min read
MP3 and AAC are lossy and small, FLAC is lossless at about half of WAV, and WAV is uncompressed. Sizes per minute, device support, tags and which to pick.
Mina Sato · Oct 13, 2026 · 11 min read
A US visa photo for the DS-160 or DV Lottery is a square JPEG from 600 × 600 to 1200 × 1200 px, 240 KB or less, head 50–69% of the height, on white. Here is how to make one.
Priya Raman · Oct 12, 2026 · 11 min read
JPG and JPEG are the same format with two spellings; PNG is lossless and keeps transparency. Compare file sizes, artifacts, what portals accept and how to convert.
Elena Vásquez · Oct 11, 2026 · 12 min read
Wear a plain mid-tone top with a visible neckline, no hat, no uniform and, for a US passport, no glasses. The written rules by country and the clothing that gets photos rejected.
Priya Raman · Oct 9, 2026 · 11 min read
Cut 2–6 seconds, scale to 320–640 px, use 10–15 fps and a palette built from the clip. Platform size limits, when MP4 beats GIF, and six ways to make one.
Mina Sato · Oct 8, 2026 · 11 min read
Instagram sizes for 2025: posts 1080 × 1350 (4:5) or 1080 × 1080, landscape 1080 × 566, Stories and Reels 1080 × 1920 with a 250 px safe zone, profile photo 320 × 320.
Jonas Weber · Oct 7, 2026 · 11 min read
Merge photos side by side, stacked, in a grid or as a carousel strip: match heights or widths first, pick PNG or JPG, keep width under 4000 px, and use the right app.
Elena Vásquez · Oct 6, 2026 · 11 min read
MOV and MP4 are near twins; the HEVC codec inside iPhone clips is what fails on Windows and Android. Free ways to convert, when quality stays exact, and fixes for common errors.
Mina Sato · Oct 5, 2026 · 11 min read
A PNG only becomes a real SVG through tracing. Learn which images trace well, how to prepare the PNG, which color and threshold settings to pick, and how to check the paths.
Jonas Weber · Oct 4, 2026 · 12 min read
A passport size photo is 3.5 × 4.5 cm (413 × 531 px at 300 DPI) in most countries, 2 × 2 in (600 × 600 px) in the US and 33 × 48 mm for China. Tables, head sizes and upload specs.
Priya Raman · Oct 3, 2026 · 12 min read
ZIP opens on every computer and phone, 7z packs smallest and hides file names, RAR adds recovery records. Compare compression, encryption, OS support and limits.
Lucas Ferreira · Sep 27, 2026 · 11 min read
Converting MP4 to MP3 re-encodes the video's AAC audio. Pick 128 kbps for speech or 192 kbps for music, extract to M4A for zero loss, and fix silent or DRM files.
Mina Sato · Sep 26, 2026 · 11 min read
Merge PDF files with Preview on a Mac, Acrobat, or a browser tool on Windows and phones. Plan page order, fix mixed page sizes, keep bookmarks and forms, and shrink the result.
Tom Okafor · Sep 23, 2026 · 11 min read
Pull a table out of a PDF, scan or photo into Excel or CSV: which route fits each source, where table recognition fails on numbers, and how to check rows and totals.
Tom Okafor · Sep 22, 2026 · 12 min read
Transcribe audio to text free with Voice Memos, Google Recorder, Word or a browser tool. What affects accuracy, how to prepare the file, and SRT vs TXT output.
Mina Sato · Sep 21, 2026 · 12 min read
Password protect a PDF with an open password and AES-256 in Acrobat, Preview, Word or a browser. Learn what permissions really block, how to share the password and what it can't hide.
Tom Okafor · Sep 19, 2026 · 11 min read
Discord free takes 10 MB, Gmail 25 MB, Outlook 20 MB. Learn how bitrate and length set file size, which settings to change, and when a share link beats compression.
Mina Sato · Sep 16, 2026 · 11 min read
Crop a photo to 1:1, 4:5, 9:16 or 16:9 on iPhone, Android, Windows, Mac or in the browser: what a ratio is, which one each platform wants, and when to pad instead.
Elena Vásquez · Sep 15, 2026 · 11 min read
Install TTF or OTF on Windows, macOS and Linux; serve WOFF2 on websites with WOFF as a fallback. What each font format holds, how big files run and what converting changes.
Jonas Weber · Sep 10, 2026 · 11 min read
Why saved images arrive as WebP, which apps and upload forms still reject it, when JPG or PNG is the right target, what converting costs, and how to get the original file.
Jonas Weber · Sep 8, 2026 · 11 min read
Split a PDF by page range, one file per page, every N pages, file size or bookmarks. Covers Preview, Print to PDF, Chrome and Acrobat, duplex scans, naming and common errors.
Tom Okafor · Sep 4, 2026 · 12 min read
Most PDF bulk is images. Strip duplicate objects, unused font data and metadata losslessly, then downsample images to 150 DPI to hit 200 KB, 500 KB, 1 MB or 2 MB limits.
Tom Okafor · Sep 3, 2026 · 11 min read
STL stores bare triangles, OBJ adds UVs and materials through an .mtl file, and 3MF packs units, color and print settings into one ZIP. Here is when each one is the right choice.
Jonas Weber · Sep 2, 2026 · 12 min read
WebP is for the web, HEIC for iPhone storage, AVIF for the smallest web photos. Compare compression, transparency, HDR, browser support in 2025 and when to convert.
Jonas Weber · Sep 1, 2026 · 11 min read
Shrink any photo to an exact KB limit: resize the pixels first, switch to JPG, then lower quality. Typical savings for each step, phone and desktop methods, and PNG fixes.
Elena Vásquez · Aug 31, 2026 · 11 min read
Baby passport photos use the adult size (2 × 2 in or 35 × 45 mm). The UK lets under-ones close their eyes; the US still wants open eyes, no hands, no pacifier and no retouching.
Priya Raman · Aug 30, 2026 · 11 min read
Convert a PDF to Word with Word 2013+, Google Docs, Acrobat or a browser tool. Learn why layout shifts, when a scan needs OCR, and how to check and fix the result.
Tom Okafor · Aug 29, 2026 · 11 min read
Scan documents to PDF with iPhone Notes, Google Drive, Windows Scan or Image Capture: 300 dpi, grayscale for text, one multi-page file, searchable and small enough to email.
Lucas Ferreira · Aug 26, 2026 · 11 min read
Turn iPhone HEIC photos into JPG with built-in tools on iPhone, Mac, Windows and Android, or batch-convert in a browser at quality 90. What you lose, what you keep, and how to stop HEIC.
Elena Vásquez · Aug 25, 2026 · 11 min read
Unzip a ZIP with tools already on your device: Extract All on Windows 11, a double-click on Mac, one tap in iPhone Files or Files by Google. Plus RAR, 7z and error fixes.
Lucas Ferreira · Aug 22, 2026 · 11 min read
Send to Kindle accepts EPUB and converts it for you; MOBI sending ended in 2022. Five routes, the 50 MB and 200 MB limits, what breaks, and when AZW3 by USB is better.
Lucas Ferreira · Aug 21, 2026 · 11 min read