मजबूत पासवर्ड सुरक्षा और एन्क्रिप्शन के साथ अपने पीडीएफ को सुरक्षित करें।
गुणवत्ता खोए बिना फ़ाइल का आकार कम करें।
Need to split a large PDF into smaller files by file size? Whether you need to meet email attachment limits (10 MB/25 MB), comply with government portal upload caps, or satisfy visa application requirements, our free online tool lets you split PDF by file size instantly. No software installation, no registration, and no watermark.
Our powerful size-based splitter automatically divides your PDF into multiple parts, each under your specified size limit. Simply enter your target size (e.g., 10 MB, 5 MB, or 100 KB), and the tool does the rest. Unlike compression, splitting preserves original quality – images, text, and formatting remain exactly as they were. Perfect for email attachments, government portals, court filings, and visa applications. Works on any device – desktop, tablet, or smartphone.
DonePDF offers comprehensive PDF splitting tools. Combine size-based splitting with compressing, merging, extracting, or organizing – all in one free platform.
Did you know? Splitting by file size is the only way to reduce file size without losing any quality. Unlike compression, which may degrade images and text, splitting preserves everything at original quality while creating multiple files that meet size limits.
Why choose DonePDF for size-based splitting: Unlike competitors that add watermarks or charge for splitting, DonePDF provides unlimited size-based splitting with no hidden fees. Your privacy is protected – all uploads are encrypted and auto-deleted after 1 hour.
Smart Size Splitting Technology: Our tool automatically calculates optimal split points to keep each part under your specified size limit. For optimal performance with large documents, use our split tool to process PDFs in chunks.
Discover when and why you need to split PDF by file size:
Many email providers limit attachments to 10 MB or 25 MB. Split large PDFs to send them via email without using file-sharing services.
Tip: After splitting, use merge to recombine parts after downloading.
Government websites often have strict upload caps (sometimes as low as 100 KB). Split PDFs to meet these requirements without losing quality.
Embassy portals typically have file size limits for supporting documents. Split large PDFs to comply with visa submission requirements.
Many court systems accept only files under specific size limits. Split large evidence and document files for legal submissions.
CMS platforms often have upload limits. Split large PDFs to upload content without resizing or compressing.
Some cloud storage services have file size limits. Split large PDFs to upload them in parts.
Many online forms and portals restrict file sizes. Split PDFs to fit within the allowed size limits.
Some document sharing platforms limit file sizes. Split large PDFs to share documents without using third-party services.
Split large PDFs to fit within storage limits of archives and document management systems.
Some networks restrict file transfer sizes. Split PDFs to transfer them over restricted networks.
Pro Feature – Custom Size Limits: Enter any size limit in MB or KB. Common limits include 100KB, 500KB, 1MB, 5MB, 10MB, 20MB, and 25MB. The tool automatically creates parts under your specified limit.
Advanced Technique – Combine with Compression: For image-heavy files, compress first to reduce size, then split if needed. This two-step approach gives you maximum flexibility.
Complete Document Workflow: After splitting by size, you can merge parts back together, compress individual parts, or organize the files for submission.
Upload Your PDF Click the "Split by File Size Now" button or drag and drop your PDF file onto the upload area. Your file is encrypted with TLS and automatically deleted after 1 hour. Supports up to 50 MB and 200 pages per document – completely free.
Set Your Size Limit Enter your target file size in MB or KB (e.g., 10, 5, 2, or 100 KB). The tool will automatically divide your PDF into multiple parts, each under your specified limit.
Preview Split Parts Review the number of parts and their estimated sizes. The tool shows you how many files will be created and their approximate sizes before splitting.
Split & Download Click "Split PDF" to divide your document. Download all parts as individual PDFs or use "Download All Files as ZIP" to get everything at once. No watermarks, no limits, no registration. Continue with editing or compressing individual parts if needed.
Pro Tips for Size-Based Splitting:
Size-based splitting is instant – the tool processes your document in seconds and creates parts under your specified size limit.
Technical detail: The tool analyzes the PDF structure and finds optimal split points (at page boundaries) to keep each part under the size limit while preserving the document integrity. Splits always occur at page boundaries to ensure clean document parts.
Compatibility: Split PDFs work with Adobe Reader, Foxit, Chrome, Edge, Safari, and all major PDF viewers. All content types are preserved.
Many tools claim to offer free PDF splitting, but they often add watermarks, limit file size, or require registration. Here's why DonePDF is the smarter choice:
DonePDF provides the most flexible size-based splitting with zero cost. Our entire PDF toolkit is completely free with no hidden premium tiers. For advanced features like custom size patterns and batch processing, try our Organize PDF Pro – still free with no watermark.
DonePDF offers 80+ free PDF tools: Merge, Split, Compress, Extract, Delete Pages, Add Page Numbers, Edit Text, Sign, and more – all free, no watermark.
Still Having Issues? Try clearing browser cache, using incognito mode, or switching browsers. For persistent issues, contact us via our contact page.
After splitting by file size, you might need these additional free tools – all with no watermark, no signup, and no limits:
Explore all 80+ PDF tools on DonePDF – completely free, no strings attached, and no registration required.
Explore detailed tutorials for every page management task:
Use our free Split PDF tool. Upload your PDF, choose "Split by Size," enter your target file size (e.g., 10 MB, 5 MB, or 100 KB), and download the parts instantly. No registration, no watermark, completely free.
"Split by Size" divides a PDF into smaller files, each under a specified size limit. Use it when you need to meet email attachment limits (10 MB/25 MB), government portal upload caps, visa application restrictions, or court filing size requirements.
No. Splitting by size preserves original quality, unlike compression. Images, text, and formatting remain exactly as they were in the original document. The process is completely lossless.
Yes. Scanned PDFs split just like regular PDFs. For image-heavy scans, consider compressing first to reduce overall size, then split if needed.
The tool will create more parts. Set a reasonable limit (e.g., 1 MB minimum) to avoid excessive fragmentation. Parts that are too small may be difficult to manage and combine later.
Yes. Files are uploaded via TLS encryption and automatically deleted after processing. We never store your documents. Learn more about our privacy policy.
Yes. Use our batch processing feature to split multiple PDFs by file size simultaneously. This is perfect for processing large document collections.
You can specify any size limit in MB or KB. Common limits include 100KB, 500KB, 1MB, 5MB, 10MB, 20MB, and 25MB. The tool will automatically divide your PDF into parts that stay under your specified limit.
Yes. You can use our Merge PDF tool to recombine the split parts back into a single PDF document.
If your file is still too large, try compressing the PDF first to reduce its size, then split it. You can also use a smaller size limit when splitting.
No limits. Split as many PDFs by file size as you need with no watermark, no sign-up, and no hidden fees. We support files up to 50 MB and up to 200 pages per document.
It depends on your needs. Splitting preserves original quality but creates multiple files. Compressing reduces file size but may degrade quality. For meeting size limits without quality loss, use splitting. For reducing size while keeping one file, use compression.
Upload your PDF, set your size limit, and download perfectly sized parts instantly. Secure, fast, and completely free. No signup, no watermark, no limits. Trusted by millions of users worldwide for meeting file size requirements.
No credit card required. No premium tiers. Everything on DonePDF is 100% free – forever.
PDF प्रबंधन में उपकरणों के पूर्ण संग्रह का अन्वेषण करें।