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 audio between MP3, WAV, Opus, M4A, FLAC, OGG, and AAC in your browser. Nothing uploads. Batch convert and download as ZIP. Perfect for WhatsApp voice notes and podcast clips.
Input formats: MP3, WAV, M4A/MP4 audio, FLAC, OGG, Opus, AAC, and WebM audio. Output formats: MP3 (lossy, tunable bitrate), WAV (lossless 16-bit PCM), and Opus (lossy, Ogg container). Any supported input can be converted to any of the three outputs.
Yes. WAV output is 16-bit PCM — a lossless encoding of the decoded audio. MP3 and Opus are lossy; they discard some audio data to achieve smaller file sizes.
No. Everything runs in your browser. The Web Audio API decodes the file locally, and the encoder (lamejs for MP3, WebCodecs for Opus) runs in the same tab. No audio data leaves your device at any point.
Opus encoding requires WebCodecs, which is supported in Chrome 94+ and Edge 94+ but not in Safari or Firefox as of 2026. If conversion to Opus fails, switch to MP3 or WAV — both work in all modern browsers.
Yes. WhatsApp exports voice recordings as .opus files. This tool converts them to MP3 locally, which is accepted by ChatGPT, email clients, and most audio apps. No upload required.
