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.
Edit ID3 tags on MP3 files in your browser — title, artist, album, year, genre, track number, comment, and album art. Like mp3tag, but no install required. Files never leave your device.
No. The entire process runs locally in your browser using the Web Audio API and browser-id3-writer. Your audio file never leaves your device.
No. ID3 tags are stored in a header separate from the audio stream. Writing tags prepends a new ID3 block without touching the audio data — it is completely lossless.
Writing uses ID3v2.3, which is universally supported by media players, phones, and streaming tools. Reading supports ID3v1/v2, Vorbis Comments (OGG/FLAC), and AAC/M4A atoms via music-metadata — but tag writing is MP3-only.
JPEG, PNG, and WebP. The image is embedded as an APIC frame (type 3 — Cover front) in the ID3 header.
The free tier supports MP3 files up to 100 MB — enough for high-bitrate albums and long recordings.
