Compress PDF According to Size – Reduce to Exact MB/KB Free
Most PDF compressors give you a random output size β you take whatever they give. ratpdf.com puts you in control: compress your PDF according to the exact file size you need. Set a target (e.g., 'under 2 MB' or 'exactly 800 KB'), and our smart engine delivers.
Ideal for job applications (max 1MB), email attachments (Gmail 25MB limit), or document management systems with file caps.
Don't guess β specify your required size. Try our tool now β free and accurate.
Compress According to My SizeChoose a size target (or enter custom)
100 KB
250 KB
500 KB
750 KB
1 MB
2 MB
3 MB
5 MB
10 MB
Custom (any value)
π Just type in your target β e.g., '2.3 MB' or '1200 KB'.
Why compress according to a specific size?
- β Meet strict requirements β Many portals reject files above a certain limit
- β Save time & frustration β No reβcompressing multiple times to hit the right size
- β Predictable results β Know your output size before you download
- β Smart image optimization β We adjust image quality and resolution dynamically
- β Text stays sharp β Our algorithm prioritizes text and vector clarity
How to compress a PDF according to your desired size
- Upload your PDF (up to 100 MB).
- Enter your target size β pick a preset or type any value (MB or KB).
- Hit 'Compress' β get a PDF that fits your requirement, usually within 2β3% accuracy.
π‘ Pro tip: For best results, set a target slightly higher than the absolute minimum β this preserves more image quality.
β Loved by students, admins, and designers β 4.9/5 from 2,100+ users.
Frequently Asked Questions
How does 'according to size' compression work?
Our algorithm analyzes your PDF and iteratively optimizes images and content streams until the file size falls below your target. It's like having a smart assistant that tweaks settings automatically to hit your number.
What if my original PDF is already smaller than my target?
We won't enlarge it. You'll get the original file unchanged β compression only happens when needed.
Can I compress a scanned PDF (image‑only) to a specific size?
Yes. For scanned documents, we reduce image DPI and recompress using JPEG/JPEG2000. The final size will be as requested, but very low targets (e.g., 100KB from a 50MB scan) may result in blurry images. We'll warn you if quality would suffer too much.
Is there any loss of text quality?
No. Text layers are always preserved losslessly. Only images (photos, scans) are adjusted. Your text remains crisp and searchable.
What units can I use?
You can use KB, MB, or just a number (we assume MB). Examples: '500KB', '1.2MB', '2' (means 2 MB).
How many compressions can I do? Any limits?
No daily limits. Compress as many PDFs as you want, each according to your chosen size. Free forever.