Tool Usage Guides
Practical, privacy-first how-tos for the everyday file jobs. Every guide links straight to the in-browser tool that does the work — nothing is uploaded.
Shrink images for the web without uploading them anywhere
Drop your page weight without sending a single photo to a server. Compress and reformat images right in your browser.
Read guide →Turn a CSV into a real Excel file in your browser
Got a plain CSV but need a workbook someone can open in Excel? Build a real .xlsx locally, no upload required.
Read guide →Merge or split PDFs privately, no cloud
Combine statements into one PDF or break a report into pages — all on your device, with nothing sent to a server.
Read guide →Pull PDF pages out as images for slides and docs
Need a PDF page as a picture for a slide or doc? Render pages to PNG right in your browser — private and instant.
Read guide →Generate a QR code for a URL or text instantly
Need a scannable QR code for a link right now? Make one in your browser — what you type never leaves your device.
Read guide →Verify a download with checksums before you trust it
A checksum proves a file is exactly what it claims to be. Compute SHA-256 locally and compare — no upload required.
Read guide →Embed a small file as Base64 instead of hosting it
Need to inline an icon or a font into HTML, CSS, or JSON? Encode it to Base64 locally, or decode it back — no upload.
Read guide →Crop images in the browser before you compress them
Cut an image down to the part you need — free-form or locked to an aspect ratio — then export as PNG, JPEG, or WebP.
Read guide →Watermark images locally to mark ownership or drafts
Stamp text onto a photo or screenshot to show who owns it or that it is a draft — position, opacity, and color, all in your browser.
Read guide →Check if a PDF is encrypted before you waste time on it
Many PDF tools fail silently on password-protected files. Detect encryption locally first — the document never leaves your device.
Read guide →PDF vs DOCX: which format should you actually send?
Someone asked for "the file" — do they want a PDF or a Word doc? Pick the right one so it looks identical on their screen and they can’t accidentally break your layout.
Read guide →PNG vs JPG vs WebP: how to choose the right image format
Three formats, three jobs. Pick by what the image is (photo, logo, screenshot) and where it’s going (web, print, app), then convert and compress locally.
Read guide →CSV vs XLSX: which spreadsheet format do you need?
A flat list or a real workbook? Know when a plain CSV is enough and when you need a true .xlsx — and convert between them without uploading your data.
Read guide →ZIP vs RAR vs 7Z: which archive format should you use?
All three pack files into one, but they differ on compression, recovery, and who can open them. Choose by compatibility vs compression strength, then verify the archive locally.
Read guide →