ToolsTray

Star a tool to keep it here.

Blog for students

I write these posts when a student question keeps landing in my inbox and the answer is longer than a sentence. How do you get a lecture recording turned into notes you can actually search? How do you hand in a PDF that fits the portal's upload cap without the diagrams turning to mush? Those are the ones worth a full walkthrough.

Every post here follows the same rule: I do the job myself first, screenshot what I actually see, and write down the numbers I actually got. If a tool falls over on a 90-minute recording, that goes in the post too. You should be able to read one of these, follow it, and get the same result on your own machine.

If you want the tools without the reading, the students shelf is one click away. The posts are for when you want to know why a setting matters, not just which button to press.

Ramsudharsan ManoharanOffice Workers

Scan documents to PDF free without installing an app

Scan documents to PDF free with your phone or laptop: auto edges, straightening, a clean-up eraser, searchable text. All in the browser, nothing installed or uploaded.

· 5 min read

ToolsTray's document scanner in Crop mode: a till receipt photographed on a wooden desk, with the four corner handles sitting on the paper's edges.

Ramsudharsan ManoharanStudents

Transcribe audio to text free, on your device

Transcribe audio to text free in your browser: a lecture, a meeting, a voice memo. Timestamps, SRT and WebVTT export, and nothing leaves your device or asks for an account.

· 3 min read

The audio transcription tool showing a finished plain-text transcript of a short standup recording, with a Format selector, Copy, and Download.

Ramsudharsan ManoharanOffice Workers

Merge PDF files free without sending them to a server

Merge PDF files free in about a second. Each PDF becomes a row you drag into order, bookmarks and filled forms come across, and the result opens to check before you save it.

· 4 min read

A merged six-page PDF open in ToolsTray's Merge PDF page well, the first page of three source files joined into one 7.1 MB document.

Ramsudharsan ManoharanOffice Workers

Add page numbers to a PDF free, and skip the cover page

Add page numbers to a PDF for free, right in your browser: pick the format and position, start the count where you want, and leave the cover page unnumbered.

· 5 min read

ToolsTray's Add Page Numbers to PDF tool showing page 2 of a six-page report stamped '1 of 5' at bottom centre, with the cover left bare.