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. 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.
Transform, analyze, and format text with instant results as you type.
Edit, convert, and optimize audio and video files.
Sourdough baker math, altitude baking adjustments, canning processing times, and homebrew ABV.
AES-256 file encryption and self-destructing encrypted notes.
Open CAD, BIM, medical, and enterprise files without paying $300-30K/year for the native software. Gerber Viewer ships first.
Free online change dpi. Change image DPI/PPI for print or web. Set to 72, 150, 300, or custom DPI. Batch a whole folder without sending a single pixel to us.
Supports PNG, JPG, WebP up to 50 MB
By default, only the DPI metadata is changed. You can optionally resample the image to change actual pixel dimensions.
300 DPI is standard for high-quality prints. 150 DPI works for large posters. 72 DPI is standard for web display.
EXIF survives. DPI changes only update the resolution tags — the pixel data and the rest of the metadata block come through unchanged.
