How to open a code or text file online
Three steps, a few seconds, no software.
Open your .JSP file
Drop it on the box, choose it from your device, or paste the text straight in.
View it instantly
Your .JSP file opens neatly formatted with line numbers.
Search, copy or download
Search the text, jump to any line, then copy what you need or download a clean copy.
What is a .JSP file?
Plain text that programs, servers and people write every day.
A JSP file is a Jakarta Server Pages source file, a web page that runs on a Java server such as Apache Tomcat, which executes embedded Java code and sends your browser plain HTML. You never receive the .jsp itself. If a site downloaded a .jsp when you expected a PDF or invoice, rename the file to .pdf (or .jpg) and open it. Developers edit .jsp source in VS Code, IntelliJ IDEA, or Eclipse.
Programs that open .JSP files
| Full name | Jakarta Server Pages (formerly JavaServer Pages) |
|---|---|
| Developer | Sun Microsystems (1999); now Eclipse Foundation (Jakarta EE) |
| First released | 1999 (JavaServer Pages 1.0); renamed Jakarta Server Pages under Jakarta EE (2019) |
| Category | Text & Code |
| MIME type | text/html |
Related viewers
Every viewer is free to use.
Frequently asked questions
Is my .JSP file uploaded anywhere?
No. The file is read and highlighted for you.
Why do some characters look wrong (é, ł)?
That usually means the file was saved in one encoding and opened in another. We detect UTF-8, UTF-16 and the Windows-1250/1252 code pages automatically and show which one was used.
Can it handle huge log files?
Yes, up to 50 MB. Only the lines on screen are drawn, so scrolling stays smooth. Syntax colours are switched off for files over 1.5 MB to keep things fast.
How do the log level filters work?
We find levels like ERROR, WARN, INFO and DEBUG on each line. Lines without a level, such as stack traces, stay with the entry above them, so filtering to errors keeps the full trace.
Can I edit the file?
This is a viewer. To change code, download it or copy it into your editor. Converting encodings and line endings is planned.
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