Classroom tools

PDF and document tools handle the full lifecycle of PDF files — creating them from scratch, editing existing ones, and extracting content — all inside the browser without requiring Adobe Acrobat or any installed software. Because processing happens client-side, your documents are not uploaded to a third-party server.

Creation tools cover the most common document types. The invoice generator produces a professional, print-ready invoice from the details you enter and exports it as a PDF in one click. The resume builder guides you through standard resume sections and renders them in a clean layout. The certificate generator is useful for courses, competitions, and events where you need to print multiple personalized documents. The business card PDF maker formats contact information into standard card dimensions ready to send to a print shop.

Conversion tools turn existing content into PDF. Markdown to PDF is particularly useful for developers and technical writers who keep notes in Markdown and want to share them in a portable format. CSV data to PDF table converts a spreadsheet export into a formatted table document. Text to PDF and images to PDF handle the simplest cases: plain text files and collections of images that you want bundled into a single document.

Editing and manipulation tools let you modify existing PDFs without recreating them. Merge combines multiple files into one. The page range extractor pulls out a subset of pages. Delete pages, reorder pages, and rotate pages handle structural changes. Adding page numbers to a PDF that lacks them is a single-step operation. The PDF metadata editor lets you update the title, author, and other document properties stored in the file.

For straightforward tasks like merging two PDFs or adding page numbers, the browser-based tools are almost always faster than launching a desktop application. For complex layouts or branded documents, the generators provide enough control to produce professional results without design software.

Audio and media browser tools bring capabilities that once required dedicated desktop software directly into your web browser — no installation, no account, no latency from round-tripping audio to a server. They are useful for musicians, podcasters, educators, developers testing audio features, and anyone who needs to generate, capture, or analyze sound on the fly.

The tools here split naturally into a few groups. Tone and frequency generators — the Online Tone Generator, Binaural Beat Generator, and White Noise Generator — produce audio signals for purposes ranging from testing speakers and hearing aids to creating ambient soundscapes for focus or sleep. The Tone Generator lets you dial in an exact frequency and waveform; the Binaural Beat Generator outputs slightly different frequencies to each ear to create a perceived beat that some users find useful for concentration; the White Noise Generator produces broadband noise that masks distracting sounds.

For musicians and performers, the Online Metronome provides a reliable click track at any tempo to keep practice consistent, while the Pitch Detector and Instrument Tuner listens through your microphone and identifies the pitch of what you play or sing, displaying its nearest note and cents deviation. The BPM tools in related categories let you convert a tempo to delay times or frequencies when setting up effects.

The recording tools — Voice and Audio Recorder and Screen Recorder — capture directly from your microphone or display without a plugin. They are practical for creating quick voice memos, recording a demo, or capturing a video walkthrough to share. The Live Audio Visualizer renders your microphone input as a real-time waveform or spectrum display, which is handy for checking microphone levels, demonstrating audio concepts in presentations, or simply exploring how different sounds look as waves.

Text to Speech converts written text into spoken audio using the voices built into your browser's speech synthesis engine, making it useful for proofreading content by ear, generating quick voice-overs, or testing how an assistive technology would read a page. When choosing between these tools, start with your goal: generating test tones or masking noise points to the generators; performing or recording music points to the metronome, tuner, or recorder; and analyzing or presenting audio points to the visualizer.