Imresizer PDF logoImresizer PDF

Compress PDF to any size

Type your target size in KB or MB, drop your PDF, and compress it instantly — right in your browser.

No uploads
No signup
Unlimited files

12M+

PDFs compressed

Any

Target size in KB or MB

<5s

Average compression time

0

Files ever uploaded

How to compress a PDF to an exact KB or MB size

Type the size you need and we hit it automatically — no account, no upload.

1

Select your PDF

Drop a file or click to browse. Works on phone, tablet, and desktop — no app to install.

2

Enter your target size

Type any value in KB or MB. We compress in your browser until the file fits under your limit.

3

Download

Save your compressed PDF instantly. No watermarks, no email, no waiting.

Compress a PDF to any size you want

A complete, free PDF compressor that targets the exact KB or MB limit you need — right in your browser.

Hit an exact KB or MB target

Need it under 100KB or below 2MB? Enter your number and we compress to fit — no guessing, no retries.

Any size, no presets

Not limited to fixed buckets. Ask for 137KB or 3.4MB and the compressor aims for exactly that.

No watermarks

Your compressed PDF comes out clean — no logos, no stamps, no added pages. Same document, smaller.

100% private & secure

Files are processed locally in your browser and never uploaded. Nothing is stored on a server.

Lightning fast

No upload round-trip means compression starts instantly and finishes in seconds, even on slow connections.

Free & unlimited

Compress as many PDFs as you want, as often as you want. No signup, no trial countdown, no paywall.

Reach any upload limit on the first try

Portals reject files over a fixed KB or MB cap. Instead of compressing blind and re-uploading, set the exact ceiling once and get a file that fits — guaranteed to land under your number.

Compress without losing quality

Smart compression downsamples only what's needed to reach your target — text stays crisp and selectable, images stay readable. You get the smallest file that still looks right on screen and in print.

Your files never leave your device

There are no uploads — compression runs fully client-side in your browser. Nothing is sent to a server, nothing is stored. Your documents stay 100% private, always.

Prefer a ready-made size?

Skip the input and jump straight to a common target — each one is a one-click compressor.

When an exact size matters

A precise KB or MB ceiling is the difference between an upload that goes through and one that bounces.

Government & visa forms

Meet the strict KB limits on passport, visa, tax, and government portals that reject oversized files.

Job applications & resumes

Fit your CV, cover letter, and portfolio under the exact upload cap on LinkedIn, Workday, and job boards.

Email attachments

Beat Gmail, Outlook, and Yahoo attachment caps so your PDF actually sends instead of bouncing back.

Online upload portals

University, exam, and registration sites enforce hard size limits — compress to fit and upload in one try.

More free PDF tools

Everything runs in your browser — private, free, and no signup, just like the compressor.

Loved by students, job seekers & professionals

Thousands of people compress a PDF here every day. Here's what a few of them say.

The visa portal needed it under 200KB exactly. I typed the number, it compressed to fit, and it uploaded first try.
Priya S. · Visa Applicant
Being able to set a precise MB limit is a lifesaver. No watermark, no signup, and the text stays perfectly sharp.
Marcus T. · Designer
As an accountant I send dozens of PDFs a week, each with its own size cap. Knowing files never leave my browser is exactly what my clients need.
Lena K. · Accountant

Frequently asked questions

How do I compress a PDF to a specific KB or MB size?

Upload your PDF, type your target size in KB or MB, and the tool compresses the file in your browser until it fits under that limit. You then download the result — no account or upload needed.

Can I target any size, or only fixed presets?

Any size. Enter an exact number like 137KB or 3.4MB and the compressor aims for that. Common presets (50KB, 100KB, 1MB, and more) are also available as one-click shortcuts.

Will compressing to a small size reduce quality?

Compression downsamples only what's needed to reach your target. Text stays crisp and selectable; images are reduced just enough to fit. Very aggressive targets on image-heavy PDFs will show more softening.

Are my files uploaded to a server?

No. Everything runs locally in your browser. Your PDF is never uploaded or stored anywhere — it stays fully private on your device.

Is it really free?

Yes. Compress as many PDFs to as many sizes as you want, with no signup, no watermark, and no paywall.