Get a scanned certificate or signature down to about 50KB for exam portals that enforce very small per-file limits. Compressed in your browser, never uploaded.
No, and any tool promising otherwise is misleading you. A scanned single page will usually get there. A long multi-page document cannot reach 50KB while staying readable — this tool tells you the smallest readable size it managed instead of silently producing something illegible.
For a single scanned page, generally yes. The tool searches for the highest quality that still fits rather than jumping straight to the harshest setting.
No. The whole process runs in your browser using your own device's processing power. The file never leaves your device, which matters for identity and financial documents.
Neither. The tool is free to use with no account and adds nothing to your document.
50KB is one of the tightest limits an Indian exam portal will ask for, and it is usually applied to a single-page item: a signature, a thumb impression, a caste or category certificate, or a one-page declaration. SSC applications are the most common place people meet it.
A single scanned page will fit. A multi-page document usually will not, at least not while staying readable — at 50KB across four or five pages there is simply not enough data left for text to survive. If your upload is rejected for size and the document is long, split it first and upload the required page on its own.
A PDF produced by a phone scanner app is mostly a photograph, and photographs compress enormously. A PDF exported from Word is already just text and font data, and may already be under 50KB — in which case this tool will leave it alone rather than degrade it for no reason.
Split it, then compress the page you actually need. Portals asking for 50KB are almost always asking for one specific item, not your whole file. Use the split tool first, keep the single page the form wants, and compress that. A one-page scan reaches 50KB comfortably; five pages sharing the same 50KB cannot.
Upload limits change between notifications and differ by document type, so treat 50KB as the size you were asked for rather than a universal rule. The instruction sheet on your application portal is the authority; if it names a different figure, use the matching page below.
Other sizes: 100KB · 150KB · 200KB · 250KB · 300KB · 500KB · 1MB · 2MB
Related: compress PDF (any size) · choose your own target · compress an image to KB