Use BlitzTrials to organise pages, add text and signatures, annotate, OCR scanned documents, create clickable links, convert PDFs to Word and export a new PDF — without sending the document to a PDF-processing server.
Your original file is not overwritten. BlitzTrials creates a new edited copy when you save.
The PDF itself is processed in your browser for the core editing workflow. BlitzTrials does not need to upload the document to a PDF-processing server to organise, annotate, edit or export it.
The editor may load fonts, account-entitlement information, analytics or optional OCR runtime/language resources. These connections are separate from uploading the PDF itself.
Use the ⋮ button on a page thumbnail to open the page action menu. The popup floats above the editor so it remains visible on mobile and when the thumbnail strip is scrolled.
Replace the selected page with another PDF page or supported image.
Add new pages around the selected page.
Rotate individual pages left or right.
Create a copy of the selected page.
Trim page edges before saving.
Resize one page or all pages to common or custom paper sizes.
Drag page thumbnails into the required order.
Remove pages you do not want in the new PDF.
https://example.com.Only http:// and https:// links are accepted.
Select Insert → Image, choose the image, then drag and resize it on the page.
Select Insert → Signature / chop. The signature workspace opens with Draw signature selected automatically.
Freehand signing is built directly into the signature workflow.
Use an existing signature, stamp or chop image.
Select Insert → Stamp, choose the required stamp, then position it on the page.
Use the freehand tool for handwriting, marks, ticks, circles or visual annotations.
Use freehand highlighting over areas that need attention.
Visual drawing or whiteout is not the same as secure redaction. Use Redaction on Save when content must be removed from the exported PDF.
Select Tools → Find text or press Ctrl + F. Search matches are highlighted on the page.
If Find encounters scanned/image-only pages without usable text, BlitzTrials can OCR those pages automatically and continue the search.
Manual OCR remains available when you want to recognise text before searching, saving or converting.
| OCR scope | Use when |
|---|---|
| Current page | Recognise only the selected page. |
| Scanned / image-only pages | Recommended. Existing searchable pages are skipped. |
| All pages | Re-run OCR across the whole document. |
OCR language choices include English, Bahasa Melayu, Bahasa Indonesia, English + Bahasa Melayu, Simplified Chinese and Traditional Chinese.
The editor service worker prepares supported OCR resources in browser storage when possible. Recognition itself runs on the device.
For compatible PDF forms, BlitzTrials can detect common text, checkbox, radio and choice fields and place completed values into the saved copy.
Add review comments, replies and targeted review pins. Comments can be resolved, reopened or deleted. They are stored as BlitzTrials review data rather than standard cross-application PDF annotations.
BlitzTrials uses its own browser-local Word reconstruction engine. OCR word positions from scanned pages can be passed directly into Word conversion.
Reconstructs editable text near its original position, keeps graphics as pictures, and rebuilds reliable straight lines and boxes as Word shapes.
Prioritises normal editable Word paragraphs and reading order. Best for rewriting reports or letters.
Places each PDF page into Word as a high-quality page image. This preserves appearance best, but page text is not editable.
Recognize scanned text automatically — OCR only pages that need text recognition.
Keep photos and graphics — preserve detected images and scan graphics where possible.
Rebuild simple lines and boxes — recreate reliable straight drawing objects as editable Word shapes.
Clean recognized words from scanned background — reduce doubled text in Editable Layout on light scan backgrounds.
PDF and Word use different layout models. Complex tables, unusual fonts, curved vector art, coloured scan backgrounds and handwriting may require manual adjustment.
Use fit page, fit width or fit height for easier viewing.
On mobile, pan the document when zoomed. Pinch with two fingers to zoom.
Use supported Ctrl/Cmd + wheel or trackpad gestures for zooming.
Less-used controls are grouped to keep the toolbar readable on small screens.
Select Save to create a new PDF. Basic export is kept simple, while Advanced options can be enabled when required.
Choose Original, Balanced or Small.
Protect the new PDF with an export password.
Flatten/redact the output when sensitive content must be removed.
Add simple header or footer text.
Add page numbering during export.
OCR'd scanned pages can receive an invisible searchable text layer.
When Redaction on Save is enabled, BlitzTrials deliberately does not embed the invisible OCR text layer, helping prevent hidden recognised text from exposing visually redacted content.
Free PDF exports include a small BlitzTrials footer watermark. A verified account with Premium entitlement receives watermark-free PDF exports. Signing in is not required to use the core editor.
Confirm that the file is a valid PDF. Password-protected PDFs may require the correct password.
Allow automatic OCR to finish, or use Tools → OCR scanned text.
The OCR engine and language files may still be preparing in browser storage. Open the editor while online and allow the service worker time to cache them.
Use Editable Layout for balance, Text First for rewriting, or Visual Copy for visual preservation.
Use Editable Layout with Clean recognized words from scanned background enabled. It works best on white or light backgrounds.
Confirm the address begins with https:// or http://, save a new PDF, then test it in a PDF viewer that supports external links.
Use Insert → Signature / chop → Draw signature. Black + Extra Fine are selected automatically.
Hard-refresh once so the latest service-worker cache becomes active.
Use an approved browser/device, protect exported files appropriately, and follow your organisation's document-retention, research-data and access-control policies.