🔒 Browser tools
14 · offlineMerge
Combine several PDFs into one
Split
Cut by page range
Rotate & reorder
Page order and rotation
Crop
Trim margins
N-up
2 or 4 pages per sheet
Page numbers
Automatic numbering
Watermark
Text watermark
Signature & stamp
Drop an image onto the PDF
Redact
Black out private areas
PDF → Image
Pages to PNG / JPG
Image → PDF
Photos into a PDF
PDF → Text
Extract body text
Compress
Image-mode re-encoding
Metadata
Edit title and author
⚡ Advanced tools Server
Heavy jobs like OCR, encryption and repair are handled on our pdf.ledeuxions.com server.
These run on a machine someone pays for. They are free to use — if they saved you time, a $0.99 day pass helps keep them running.
High-quality compress
Smaller file, quality kept
SRVOCR text extraction
Read text from scanned PDFs
SRVSet password
Encrypt and protect a PDF
SRVRemove password
Strip encryption
SRVRemove metadata
Erase hidden personal data
SRVRepair PDF
Restore damaged files
SRVPage numbers
Precise server-side insertion
SRVN-up layout
Any rows and columns
SRVOffice → PDF
Convert Word, Excel, PPT
SRVWatermark
Server-side watermarking
Combine multiple PDFs into one, in order.
Settings
💡 Reorder items with the ▲▼ buttons.
Settings
Settings
Margins (mm)
Settings
Settings
Settings
Signature image
A transparent PNG works best. A PNG made with a stamp extractor can be used as-is.
💡 Pick a signature from the tray, then click the preview to drop it there.
Settings
💡 Drag to draw a rectangle. A black box is permanently burned in at that spot.
Settings
Settings
Settings
Compress (image mode)
Redraws every page as a JPG image, producing a far smaller PDF. Text search is lost in exchange.
Settings
⚠️ After compression the PDF is image-based — text selection and search will no longer work.
Current metadata
New metadata
High-quality compress Server
The server re-optimises the images, shrinking the file with minimal quality loss.
Run
Your file is sent to the server, processed, and returned right away.
OCR text extraction Server
Recognises characters in scanned or image-only PDFs and turns them into text.
Settings
Settings
Settings
Remove metadata Server
Completely wipes hidden info such as title, author and producer on the server.
Run
Repair PDF Server
Rebuilds the internal structure of a corrupt or unopenable PDF and tries to recover it.
Run
Settings
Settings
.docx · .xlsx · .pptx · .doc · .hwp · .odt and more
Run
Settings
Guides
Practical write-ups for the problems people actually bring to a PDF tool — upload limits, oversized scans, application bundles — written by the people who run PDF300.
- How to reduce a PDF to under 300 KB without making it unreadable
- Why scanned PDFs are so large, and how to fix it
- PDF vs image: which should you upload to an online form?
- Merging documents for visa and job applications: order, size and naming
- Is it safe to use online PDF tools? What happens to your files
About PDF300
PDF300 is made by LeDeuxions, a small architect-led studio in Korea. The name comes from the 300 KB upload limit that so many forms impose. Fourteen tools run entirely in your browser and never upload your file; ten heavier tools (OCR, Office conversion, high-quality compression and others) run on a server we operate ourselves, and each tool page says which is which. Read how files are handled in our privacy policy and this guide.
Every PDF300 tool, one page each
Each tool also has its own page with a short how-to and answers to common questions.
- Add Page Numbers on the Server
- Add Page Numbers to PDF
- Add Watermark to PDF
- Compress PDF
- High-Quality PDF Compression
- Crop PDF
- Edit PDF Metadata
- Image to PDF
- Merge PDF
- Word, Excel, PowerPoint to PDF
- Password Protect a PDF
- PDF 2 or 4 Pages Per Sheet
- N-up PDF on the Server
- PDF OCR
- PDF to Image
- PDF to Text
- Redact PDF
- Remove PDF Metadata
- Remove a PDF Password
- Repair a Broken PDF
- Rotate PDF
- Sign a PDF
- Split PDF
- Compress PDF to Target Size (Exact MB/KB)
- Watermark a PDF on the Server