Local PDF Studio - Offline PDF Editor & Annotator

Edit, annotate, sign and fill PDFs 100% offline in Chrome. Merge, split, compress, watermark. Files never leave your device.

Local PDF Studio is a free PDF editor, annotator and viewer that runs entirely inside Chrome. Every file stays on your device: nothing is uploaded, nothing is tracked, and it works without an internet connection. Most "free online PDF editors" send your documents to a server. Contracts, medical records, tax forms and signed agreements end up on someone else's machine. Local PDF Studio takes the opposite approach: the whole editor lives in the extension, so your PDFs never leave the browser. WHY LOCAL PDF STUDIO • Private by design: no account, no servers, no analytics, no telemetry • Works offline: edit PDFs on a plane, in a locked-down office, or on a bad connection • No caps: no file-size limits, no page limits, no daily quotas, no watermarks stamped on your exports • Never lose work: your session auto-saves in the browser and survives a closed tab or a crash ANNOTATE AND MARK UP • Highlight, underline and strike through text • Freehand drawing with smooth, pen-like strokes • Text boxes with custom font, size, color and style • Rectangles and sticky notes • Full undo and redo history SIGN AND FILL • Sign PDFs by drawing, typing or uploading an image of your signature, then reuse it across documents • Fill PDF forms (AcroForm) and flatten them on export so your entries stay put ORGANIZE PAGES • Merge PDFs, split PDFs and extract page ranges • Reorder pages by drag and drop in the thumbnail sidebar • Rotate, delete and crop pages, with margin auto-detection and batch apply • Add images as new pages EXPORT • Compress PDFs on export with quality presets and image resampling • Add text watermarks with live preview • Flatten annotations and form fields into a standard PDF that opens anywhere READ AND NAVIGATE • Fast rendering of large documents, in single-page or continuous scroll • Search inside the document • Keyboard shortcuts for navigation, zoom and tools • Light and dark themes • Side panel reader: keep a PDF open next to any tab, and drag selected text straight into your notes BUILT INTO CHROME • Right-click any PDF link → Open in Local PDF Studio • Right-click any image → Append image as page • Right-click selected text → Add selection as note • Optional: open every .pdf link in Local PDF Studio instead of Chrome's built-in viewer (off by default, asks for permission first) PERMISSIONS, EXPLAINED Local PDF Studio asks for no site access at install. The optional "Use Studio for all PDFs" setting requests site access only when you switch it on, and uses it only to fetch the PDF you clicked. Revoke it any time from chrome://extensions and the feature turns itself off. WHO IT IS FOR Students annotating lecture slides, lawyers and HR teams handling confidential contracts, researchers reading papers in a side panel, anyone signing a form, and anyone who would rather not upload their documents to a random website. Install Local PDF Studio and edit, sign and annotate PDFs privately, offline, right in Chrome.