JSON to PDF
Turn JSON into a readable PDF. The data is neatly indented and colour-coded: keys, text, numbers and true/false/null each get their own colour. Invalid JSON is caught, with the line where it breaks.
JSON to PDF
Open or paste · Adjust · Convert
How to convert JSON to PDF
Add your JSON
Drop the file onto the tool or paste the content into the box.
Adjust the layout
Choose page size, orientation, text size and margins. The preview shows every page.
Download
Press Convert to PDF and download.
Why use it
What this free tool does
Pretty printed
Consistent indentation of 2 or 4 spaces.
Colour-coded
Keys, strings, numbers and literals in different colours.
Line numbers
Optional numbers for reference.
Error checking
Shows where invalid JSON breaks.
Paste or upload
Use a .json file or paste data.
Long values wrap
Nothing runs off the page.
Why convert JSON to PDF?
API responses and configuration files are often a single long line of JSON. Formatting it with indentation and colour makes it easy to read, review and share as a document.
Your data is checked as it is converted; if it isn't valid JSON, you see the error instead of a broken PDF.
Tip: Converting several files? Convert each one, then join them with Merge PDF.
Your files stay on your device
Most online PDF sites upload your documents to their servers. Aleynray Ai does the work inside your browser instead, on your own computer or phone.
Nothing is sent anywhere, so contracts, bank statements, IDs and medical forms stay private, and there is no waiting for uploads.
- Free, with no sign-up or limits
- No watermark
- Files never leave your device
- Opens password-protected PDFs
- Works on desktop and mobile
Frequently asked questions
What if my JSON has an error?
The tool shows the error and roughly where it is, and doesn't make a PDF until the JSON is valid.
Can I paste JSON?
Yes. Paste it into the box under the drop area.
Are other languages supported?
Text in Latin, Greek and Cyrillic alphabets displays correctly. Characters from scripts like Chinese, Japanese, Arabic or Hindi are not in the built-in font yet and show as empty boxes.
Is it free?
Yes. There is no sign-up, no limit on files and no watermark.
Are my files uploaded?
No. The tool runs inside your web browser and works on the file on your own device. Nothing is sent to a server, so private documents stay private.