Edit text in place, sign, redact, reorganize. True content-stream rewrite, not stamp-on-top.
LaunchEdit, sign, redact, and reorganize PDF files in your browser. The Adobe Acrobat alternative that runs on your device — no upload, no subscription.
Pixel-perfect PDF diff with word-level text view, metadata + form-field compare, ruler, and exclusion zones.
LaunchSide-by-side or overlay PDF diff with a document-type selector — Document (contracts, reports), AEC / Blueprint (drawings, schematics), or Image-Scan. Highlights pixel-level differences plus a word-level text diff in a modal.
Open any PCB Gerber bundle in your browser. Gerber X2, Excellon, layer compare, snap-to-pad measure, snapshot URLs.
LaunchOpen RS-274X / X2 Gerber and Excellon files. Inspect layers, measure traces, export to PNG / SVG / DXF.
Compress, merge, split, convert, and manipulate PDF files.
Resize, compress, convert, and transform images.
Format, encode, decode, and validate code and data — safe for production secrets.
Convert, compress, and cut audio and video — MP3, WAV, MP4, WebM, Opus — all in your browser, nothing uploads.
Sourdough baker math, canning processing times — kitchen math you should not memorize.
AES-256 file encryption and self-destructing encrypted notes.
Analyze packet captures and run sysadmin diagnostics in your browser — nothing uploads. PCAP Analyzer ships first.
Chart-overlay technical analysis and precision financial math — your screenshots and numbers never leave your device.
Open CAD, BIM, medical, and enterprise files without paying $300-30K/year for the native software. Gerber Viewer ships first.
Convert MKV, MOV, AVI, or WebM to MP4 in your browser. Fast lossless copy when possible; re-encode for compatibility. No upload, no watermark, works on Mac, Windows, and Linux.
Apple's QuickTime and iOS do not support the MKV container. This tool rewraps the video into an MP4 — using a fast lossless copy when the video codec is already H.264 or H.265, so there is no quality loss and conversion is nearly instant.
Fast mode stream-copies the video into an MP4 container without re-encoding — no quality loss, no waiting. Re-encode mode transcodes the video to H.264 via WebCodecs, which takes longer but maximises compatibility with older devices and media players.
MKV (.mkv), MOV (.mov), AVI (.avi), WebM (.webm), and MP4 (.mp4) — up to 500 MB each. Batch mode converts multiple files at once and packages them as a ZIP.
No. Conversion runs entirely in your browser using WebCodecs. Your files are never uploaded to a server.
Fast (stream-copy) works when the video codec is already MP4-compatible (e.g., H.264 in an MKV). If the codec is not MP4-legal (e.g., VP9 in WebM) the tool automatically falls back to re-encoding so you always get an MP4.
