Check network latency, calculate screen dimensions, convert timestamps, and work with images and PDFs. Files are processed on your device; network tests contact the services described on each tool page.
No files leave your computer. Processed entirely in browser memory.
Instant in-memory processing with no queueing, upload bars, or server lag.
Jump right into any tool immediately. No registration or email needed.
Zero paywalls, no daily caps, and full original resolution downloads.
Most online file tools bait you with free previews, then ask for a monthly subscription to download your full-resolution result. We don't.
Network checks, screen dimensions, timestamps, and everyday file tools
Measure download and upload speed in Mbps, plus HTTPS latency and jitter. See MB/s equivalents and compare your browser connection to Cloudflare.
Compare your public IP with WebRTC candidates to check possible VPN IP exposure. No camera access needed. The test contacts IP lookup and STUN servers.
Test browser HTTPS latency and jitter with five probes or continuous monitoring. See failed requests in real time; this does not measure download speed or ICMP ping.
Calculate screen width and height from diagonal and aspect ratio, or find the diagonal from width and height. Compare TV and monitor sizes in inches or centimeters.
Convert Unix timestamps in seconds or milliseconds to a readable date, or convert a date to Unix time. Compare UTC and supported time zones in your browser.
Check how large an image can print from its pixel dimensions and DPI. Compare physical print sizes before resizing or sending an image to a printer.
Calculate running pace from distance and elapsed minutes. See minutes per kilometer, minutes per mile, and average speed in km/h together.
Remove audio from a local video in your browser. Preview the muted result and download it, with supported formats and limits explained beside the tool.
Look up domain DNS records through a public DNS resolver. Inspect returned records and compare the result when troubleshooting domain configuration.
Format JSON into readable, indented text and find syntax errors. Check the result before copying; valid JSON syntax does not guarantee valid application data.
Resize image pixel dimensions or crop to a new aspect ratio in your browser. Preview a representative image before applying the settings to a batch.
Compress PDF documents locally in your browser. Choose Recommended, Low, Extreme, or Lossless presets to shrink files for email and web uploads.
Dedicated tools for every area of your health, life, and workflow
Inspect your public IP, query DNS records, check WebRTC exposure, and measure browser latency.
Compress, convert, resize, and edit images instantly in your browser with zero data leaving your device.
Merge, split, extract, rotate, and create PDF documents entirely client-side using WebAssembly and canvas engines.
Extract audio, trim media, convert video to animated GIF, and generate tones with high-speed browser engines.
Essential developer toolset: JSON formatter, JWT decoder, Regex tester, hash generator, UUID maker, and Diff viewer.
Convert CSV to JSON, XML to JSON, change text cases, calculate word statistics, and remove duplicates.
Generate QR codes, build meta tags, convert color codes, generate secure passwords, and calculate units.
Sleep cycle optimizer, TDEE & macro planners, reverse conception & due date estimators, body fat calculators, and health trackers — 100% private.
Smart sizing calculators, international measurement conversions, body shape analysis, and everyday lifestyle utilities.
Final exam score planner, CGPA to percentage converter, weighted GPA & syllabus grade calculators, test grader, and college attendance trackers.
Mortgage early payoff planner, compound interest wealth simulator, auto loan calculator, credit card debt payoff, and freelance salary converter.
