Render PDFs inside Fiddler 2 Comments Wednesday, July 10, 2013 by Fiddler Over the years, I’ve received several requests to extend Fiddler to support viewing PDF files directly within the debugger. PDF is a complicated binary format and it doesn’t work well with any of Fiddler’s default Inspectors, which are best suited to inspect web pages, images, and data formats like XML and JSON. Fortunately, Fiddler’s powerful extension model permits developers to easily extend the tool to handle any data format, and I recently discovered that Telerik’s RadControls for WinForms library includes a PDF-rendering component. The library enabled me to build a PDF document viewing Inspector in just 80 lines of code, and it doesn’t require the user have any third-party PDF-viewer applications installed. The new PDFView Inspector for Fiddler ( download here ) enables you to view PDF files directly within Fiddler’s Inspectors tab, whether you’re viewing a simple document: …or a richly-formatted eBook: The RadPdfViewer control supports all the features users expect, so you can search and print the document, copy/paste from it, zoom in/out, et cetera, all without requiring a single line of code on my part. If you’re interested, you can watch a quick-start video about the control here . I hope you’ll find PDFView useful. If you have any questions about this new Inspector or the Telerik RadControls, please let me know! -Eric Lawrence LinkedInMailTo Read more articles by Fiddler - or - read latest articles in Developer Tools About the author Eric Lawrence Eric Lawrence (@ericlaw) has built websites and web client software since the mid-1990s. After over a decade of working on the web for Microsoft, Eric joined Telerik in October 2012 to enhance the Fiddler Web Debugger on a full-time basis. With his recent move to Austin, Texas, Eric has now lived in the American South, North, West, and East. 2 Comments Fiddler is the best thing since sliced bread and is my number one tool for fiddling with spyware requests and sending duff data back to the mallware providers so that the profiles they sell become worthless because blocking requests has not worked for the past ten years and spying continues to get bigger. Eric is a top man and will always help you out if you have trouble and he is one of the few people I would love to work with having seen the excellent job he and his team have done with fiddler. One day I hope to talk Eric into building a DNS-Server into fiddler so that traffic for devices that cannot be configured to use a proxy server can be fooled into using Fiddler on port 80 with care taken so that Fidder does not creat a feed-back loop and adding a DNS-Server to fiddler would also enable the IP address of a host to be known during AutoTamperRequestBefore and this alone opens up the possiblility of blocking /tampering based on an address range. Not sure I would use a pdf viewer very often but I will be looking at the tool for spoofing geo-locations and didn't know SSL was used for these services. Keep up the good work Eric. How can I download the pdf? [EricLaw] It's not clear what you're asking; if you're looking at a PDF in Fiddler, you have downloaded it. If you're asking how to save the PDF to disk, right-click the Session and choose Save > Response > Response Body. You are not allowed to post comments.