Compress PDF to 50kB

For a single typed page, yes. If the lossless method is enough, nothing about the text changes and it stays selectable and searchable. If the page has to be re-rendered, it becomes a JPEG image at 150 dpi or a little less; black & white keeps typed letters crisp at that size, while handwriting and small stamps soften but remain legible. The result card names the method, so you know which happened before you download.

Two or three typed pages in black & white can share the budget. Beyond that each page gets so few bytes that scanned text turns to mush, and the tool will say the target could not be reached rather than hand you an unreadable file. A digital document of several pages sometimes fits through the lossless pass if it is plain text with few fonts, but the safer move for anything longer is to split the file or move up to a larger preset.

The tool searches for the highest quality that still fits and keeps the first result that lands under the target, so you get a few kB of margin. Most portals count 1 kB as 1,000 bytes, a few count 1,024, and a file just under 50,000 bytes passes a 50 KB maximum under either rule.

No, choose a larger target. A window such as 50–300 KB, which JEE Main, NEET UG and CUET UG 2026 use for certificates, sets 50 as the minimum, and because our result sits just below the number you type it would fall short of the check. Set 100 kB or 150 kB instead; the limit that matters there is the 300 KB ceiling, and you will have plenty of room under it.

No. It converts each page to grayscale before encoding, so a blue seal becomes a grey seal and the words, numbers and signatures are untouched. At 50 kB the switch is worth making for anything printed on paper. Leave it off only when the notice asks for a colour scan, and in that case pick a larger target so the colour has room to survive.

It is, with no catches. You will not meet a paywall after the first file, a cap on pages, a size restriction beyond the 100 MB input limit, or a stamp on the output. We do not ask for an email address or an account. Ads on the page cover our hosting bill, and since your device does the processing, we have no per-file costs to pass on. Whether you compress one certificate or every document for a job application, the price is the same: nothing. There is no paid plan waiting behind the free one.

There is nothing to install. The PDF compressor is a normal web page that loads its compression code (Mozilla's pdf.js and pdf-lib) into the browser and runs it there. Any current version of Chrome, Edge, Firefox, Safari or Samsung Internet will do, on Android, iPhone, Windows, macOS or Linux. You can pin the page to your home screen through your browser's Add to Home Screen option if you like a one-tap icon, but it still fetches the page over the internet each time, so it is not an offline app. We publish nothing in any app store, and no software needs updating.

Start by dropping your PDF into the upload box or tapping browse to select it; the tool opens the file on your device. Next, check the Target Size field. On a preset page the number is already filled in, but you can change it and switch the unit between kB, MB and %. Tick black & white if the file is a scan and you want extra savings. Then press the compress button. The result panel shows the first page before and after, the new size, the percentage saved, the page count and which method was used. Press Download to save the file.

This tool accepts PDF files only, up to 100 MB and with any number of pages. It cannot open a password-protected PDF; remove the password in the program that created it, then try again. Word, Excel or image files need converting to PDF first, which most phones and computers can do through Print to PDF or Save as PDF. The output is always a standard PDF with the original page sizes. If you want to shrink photos rather than documents, use the [image compressor](/), which handles JPG, PNG, WebP, GIF, BMP, AVIF and HEIC where the browser can decode it.

Your PDF is never sent anywhere, so there is no upload to worry about. The browser opens the file locally, and both compression methods run on your own processor: the lossless pass re-saves the document with compressed streams, and the re-render pass draws each page and packs it into a fresh PDF, all in memory on your device. Our servers only deliver the page itself. This matters for the kind of documents people compress: ID scans, bank statements, offer letters, medical reports. They remain as private after compression as they were before you opened the tool.

We cannot store what we never receive. Because the whole process happens in your browser, no copy of your document, its pages or its text is written to our servers, and there is no account history tying files to you. The compressed PDF lands in your Downloads folder and nowhere else. Our hosting provider keeps standard server logs for page requests, which record things like IP address and browser type but never file contents. We also run no database. For a plain-language description of what little data the site does handle, see our privacy policy.

Mb2KbSizer shrinks images and PDF documents to a size you choose, free of charge, without leaving your browser. Give the PDF compressor a file of up to 100 MB, enter a target in kB, MB or as a percentage of the original, and it works to bring the document under that figure. Typical jobs include getting a scanned marksheet below a portal's cap, squeezing a multi-page application form into an email, or lightening a report before sharing it. The same site offers an [image compressor](/) and a bulk image compressor, both built on the same no-upload approach.