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Structure 0

Open a PDF to see its outline.

Results 0

Results appear here automatically.

Equations 0

Expand to index equations.

Bibliography 0

Numbered references appear here.

Annotations 0

Highlights and margin notes appear here.

Local library 0

Stored locally on this device.

Open a PDF once and MathReader will remember it here.

MathReader

A focused reader for mathematical PDFs.

Read papers, follow references, and keep your place locally.

or drop a PDF anywhere in this window

Recent on this device Reopens locally — no file picker needed

Selectable PDF text Rectangle formula → LaTeX Pin reference pages Page notes & bookmarks

PDFs and reading data are kept on this device when browser storage permits. Formula images are processed in your browser, not uploaded to this website.

Reading

Pinned reference ·

Opening PDF…

Document info

Local-only tags, reading status, and a personal note for this PDF.

Status Tags Personal document note

Formula OCR

Image OCR is the default for two-dimensional formulas. PDF vector is a fast local comparison for PDFs with text. Diagrams may not parse reliably.

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Ready · Image OCR default

Processing formulaProcessing…

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Image OCR is preferred for formula rectangles. PDF vector is available for manual comparison. Results remain editable and should be checked before reuse.

Extracted LaTeX · editable

Rendered preview

Recent formula extraction0

Recent results appear here.

Page note

PDF comments are read-only and come from the document. Your page note stays local. LaTeX: use \(...\) inline or \[...\] for display math.

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PDF comments 0

Saved locally

Annotations

Highlights and margin notes are position-anchored in this PDF and saved locally.

Select text to create a highlight or margin note.

Symbol glossary

Save a document-local symbol and its meaning, then find every occurrence in the PDF.

Select a symbol or enter one above.

Backlinks

Shows places in this PDF that cite the equation, bibliography item, or mathematical structure you just followed.

Follow an equation, citation, theorem, or section reference to see its backlinks.

Recently deleted

Deleted bookmarks, annotations, symbols and cleared reading trails can be restored here. Ctrl/Cmd+Z restores the newest item when you are not typing.

Nothing recently deleted.

Recovery

MathReader keeps lightweight local snapshots of durable reading data independently of the cached PDF blob. Restoring a snapshot replaces local notes/bookmarks/annotations with that snapshot.

Recovery snapshots appear automatically after your reading data changes.

Reading trail

MathReader saves where you were before navigation jumps. Newest entries appear first; click one to return.

Follow a cross-reference or other navigation jump to start a reading trail.

Reference view

Pin a page to keep it visible while reading elsewhere.

No page pinned

Settings

Display, OCR, and export preferences are saved in this browser.

Display

Reading flow

Page appearance Brightness100% Contrast100% Page spacing20 px Page shadow

Display filters do not affect Formula OCR crops.

Formula OCR

Default extraction Image OCR engine

Troubleshooting

OCR timing

No OCR run yet.

Export data

Include detection data Contents indexes and detection evidence Include full-document text PDF text and stored OCR, if available

Shortcuts

↑ ↓: Scroll reading area
← →: Previous / next page
Ctrl/Cmd F: Search PDF
O: Open PDF
F: Toggle Formula OCR
C: Open Contents
H: Open History
S: Open Bookmarks
D: Change display
N: Open page note
P: Pin current page
L: Toggle left sidebar
R: Toggle right sidebar
B: Toggle both side panels
Shift L: Collapse all Contents groups
Shift R: Collapse all right-panel sections
Ctrl/Cmd K: Command palette
Alt ←: Back in reading trail