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PDF editing guidePrivacy and local storage

Light uses off-white. PDF colors stay unchanged.

PanDrag to pan
Tap objects to add or remove them. Drag a selected object to move the selection. Ctrl or Command click also adds objects. Drag empty page space to select a region. Shift is reserved for free movement without snapping.Text sections are on by default. Related original text runs move and resize together, keeping their spacing. Turn this off, use Individual run, or Alt-click to select one original run. The preference is kept while this editor is open and is not saved in your PDF or session.Snap and alignment guides are on by default. Toggle Snap to turn both off. Hold Shift while dragging to move freely.
PDF workspace
100%

Open a PDF.

Edit its text, move elements, fill a form, or arrange its pages.

Or drop a PDF here. Up to 30 MB.

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Your PDF is processed in this browser. It isn't uploaded.

Open a PDF to begin.

Add text

Adds a text mark. Existing PDF text is unchanged.

Change fonts across this document

Font changes only. Colors and positions are retained. Added text keeps its explicit size. Scanned text and form fields are excluded. Apply any typed text changes first.

Shrink each original text run only when needed to fit its original width and height. Keeps its baseline. No line wrapping or paragraph reflow. Uncheck to keep original sizes.

Export preview

Current page, rendered from your edited PDF.

About Castleaf

This is an early editor demo. Export writes a separate file. Save an editable session from the File menu to keep marks editable.

Text adds a new mark. Select groups nearby original text into conservative sections by default, retaining every run and its spacing. Text sections can be switched off, and expanded Layers or Alt-click selects individual runs. Homogeneous sections with one original run per line can be edited together while keeping their original line count and baselines. Select can also edit supported individual original text runs and move original text, images, and shapes. The font picker identifies reported PDF font names, offers free alternatives and imports licensed static TrueType fonts. Original text edits can shrink to their original width and height, with the baseline preserved. Review the fit and readability before applying; keep-size mode can produce overlaps. Paragraph reflow, clipped content and complex-script replacement are not supported yet. Moves and page reordering retain links, forms, bookmarks and tags, with structure checks before export. Marked text cannot be replaced yet; reading order is retained rather than rebuilt. Hidden layers are omitted from exported PDFs but remain recoverable in a saved Castleaf session. No OCR, encryption, secure redaction, or digital certificate signing yet.

Select an object, then use its floating controls. Double-click supported text to edit. Arrow keys nudge; Shift + arrow nudges 10 points. Alt-click cycles overlapping objects. Ctrl/Cmd-click or the Multi-select button adds and removes objects. Drag empty page space to select a region. Selected objects move together; corner handles resize proportionally. Resize and arrange controls are available in Properties. Selection is local to the current page and is cleared when pages or documents change. Smart guides align dragged objects with page edges, page centers and visible objects on that page. Snap turns snapping and guides on or off; hold Shift during a drag to move freely. The live readout uses PDF points and shows the moved bounding box’s bottom-left X/Y and movement delta, including any crop offset. Guides are temporary and are never exported or saved. Escape cancels a drag. Ctrl/Cmd + Z undoes; Ctrl + Y or Ctrl/Cmd + Shift + Z redoes.

Drawing over words does not remove them. A drawn signature is a visual mark only.

Local autosave keeps the latest document and committed edits in this browser, including the original PDF. Restore it from the welcome screen or File menu. One tab can autosave at a time. Browser data clearing, private browsing and storage limits can remove or prevent recovery; download an editable session for a durable backup. Drafts are stored unencrypted on this device and are not uploaded.

Sessions contain your original PDF and edits, unencrypted. Keep them private. Review exported documents before using them.