Free Online Toolbox

Not necessarily, and that's a trap many people fall into. A 50% ROI on a $100 investment gives you $50, but a 10% ROI on $10,000 gives you $1,000. The calculator shows you both the percentage and the net profit in dollars, so always check both numbers. Also, a high ROI often comes with higher risk. Use the tool to compare, but factor in volatility and your own timeline before committing.

Older Firefox versions had a bug where sub-pixel rounding made curves look jagged, especially under 4px radii. Chrome renders those same values with smoother anti-aliasing. Your generated code isn't wrong — the browser's rendering engine differs. Test with at least a 6px radius to hide the discrepancy, and add `-moz-border-radius` only if you're stuck supporting Firefox ESR 102. For modern browsers, the standard `border-radius` property handles everything correctly. I check my output in both browsers before shipping, and you should too, if the design is client-facing.

No installation at all. The whole thing runs inside your browser tab—no plugins, no downloads, no sign-up. You open the page, drop your PDF in, and you're done. Works on Windows, macOS, Linux, even a Chromebook. One caveat: use a modern browser like Chrome, Edge, or Firefox. Older versions might choke on the file processing. I've watched colleagues watermark 50-page contracts in under a minute, all without IT approval.

Nothing. Your audio stays completely untouched. The tool only renders text pixels onto the video frames, so the sound quality, volume levels, and any background music or voiceover remain exactly as they were. I've burned subtitles onto lectures and podcasts, and the audio file integrity held up perfectly. If you notice any sync issues after burning, check your SRT timing first — the tool follows it precisely. A good tip: keep a 100ms delay in your SRT if your captions feel early, especially when recording screen shares.

Yes, and sync issues won't happen because we extract the audio track directly from the container, not by recording playback. Screen recordings from iOS and Android store audio as a separate stream, so you get perfect sync every time. I've converted hundreds of Zoom and Loom recordings this way for podcast edits. One tip: if your screen recording has system sounds and microphone audio mixed, you'll get both in the MP3. Use a splitter app first if you want just your voice.

The tool auto-filters basic English stop words like 'the', 'and', and 'of', but that list isn't editable. If you want to drop a specific term like 'really' or 'actually', edit your source text before pasting. Find-replace the word with a space in a text editor — takes about 20 seconds. For example, replace 'actually' with '' across your document. Then paste the cleaned text. You'll get a much sharper cloud without common filler dominating the layout.