Practical guides on getting data out of files — PDFs, images, archives and Windows installers — from the people who build the free tools.
Browser-based file processing means your file never leaves your device — JavaScript running inside your browser tab does all the work locally, and no data is sent anywhere. Server-side processing means your file is…
Read the guide →Uploading a PDF to an online tool is usually safe for non-sensitive documents, but most services copy your file to their servers and keep it for hours or days before deleting it — which…
Read the guide →Structured data is information organised into a fixed shape — rows, columns, and defined fields — so a computer can read it directly, while unstructured data has no predefined layout and must be interpreted…
Read the guide →OCR (Optical Character Recognition) reads text from an image by analysing pixels — it is for scans, screenshots, and photos where the text is baked into the picture. Text extraction copies text that is…
Read the guide →Email headers are the routing log attached to every message — they record every server the email passed through, the real sender address, authentication results (SPF, DKIM, DMARC), and timestamps. Your inbox only shows…
Read the guide →An email extractor pulls addresses from text you already have — a paste, a CSV, a log, a document. An email finder looks up addresses you don’t have, usually by searching a domain or…
Read the guide →A .gz file is a single file compressed with gzip — commonly a server log, SQL database dump, JSON export, or CSV snapshot — and the fastest way to open one is to drop…
Read the guide →A photo of your signature has a white paper background baked in — drop it onto a document or email and you get a white box that sits on top of everything, looking nothing…
Read the guide →The key difference is that these formats split the job of “archiving” (bundling many files into one) and “compression” (making it smaller) differently: ZIP does both together, TAR only bundles, GZ only compresses a…
Read the guide →A ZIP that won’t open is almost always one of five things: an incomplete or interrupted download, a file that was renamed to .zip but isn’t actually a ZIP, a password-protected archive, a multi-part…
Read the guide →Every tool runs in your browser and never uploads your files. Browse the full tool directory →