NTPC (Under-Graduate) PDF Compressor & Merger
Certificate to PDF (2026)
Two tools in one: Convert certificate photos to PDF, and Merge multiple marksheets into one compressed PDF under 500KB.
Tool 1: Certificate to PDF Converter
Tool 2: Multi-Page PDF Merge & Compressor
100% Private: All processing happens in your browser. Files never leave your device.
Why compress your PDFs for NTPC (Under-Graduate)?
During the 2026 NTPC (Under-Graduate) online registration, the Railway Recruitment Board (RRB) requires candidates to upload educational mark sheets and reservation certificates strictly in PDF format. The portal will block any upload that exceeds the strict 500KB maximum file size. Additionally, if your degree spans multiple semesters, you must merge all pages into a single PDF document before uploading. Our free RRB PDF toolkit performs both the merging and the heavy compression locally in your browser, ensuring your documents remain readable while securely passing the upload constraints.
How to Use
Upload Files
Upload your semester marksheets, certificates, or images (JPG, PNG, or PDF).
Reorder & Configure
Drag files into order. Adjust target size to match RRB's requirement (500KB).
Merge & Compress
Click "Merge & Generate PDF". Our engine combines all files and auto-compresses.
Download
Download the merged PDF — ready for the RRB portal.
FAQ
Is this PDF tool officially provided by RRB?
No. FreeApplyTools is independent. Our engine follows the RRB notification rules for 2026.
What is the maximum PDF size for RRB?
For most certificate uploads, the limit is 500KB. Our tool auto-compresses to stay under this limit.
Common NTPC (Under-Graduate) PDF Upload Errors
"PDF exceeds 500KB size limit"
The RRB portal blocks certificate uploads above 500KB. Our compressor automatically reduces file size while preserving readability.
"Multiple marksheets rejected — only single PDF accepted"
Many portals require all semester marksheets merged into one PDF. Use our merger tool above to combine multiple pages into a single file.
"Uploaded image instead of PDF"
Some portals only accept PDF format for certificates. Use our converter above to turn JPG/PNG images into properly formatted PDFs.
Next Steps for NTPC (Under-Graduate)
Continue preparing your application documents with official specifications.