CornerTools

PDF Editor

Type in English or Hindi. What you add is laid over the page; a line of text you edit is rewritten, and the rest is left as it was.

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Processed in this browser · one at a time

Changes the words already in a PDF, fills in its form and adds what the PDF is missing: your name and address on a form that has no fields, a tick in a box, today's date, a signature drawn with a finger or photographed on paper, a stamp or a photo, a highlight over a line, or white-out over something no longer needed. Text can be typed in English or Hindi, in added text and in form fields alike. What you add is laid over the pages, which are not drawn again, so the PDF's own text stays selectable and its links keep working; only a line of text you edit or delete is rewritten. The PDF is edited on your device and never uploaded.

How to use it

Add a PDF; one that needs a password asks for it, and the saved copy has none. Its pages show one under another: zoom with the buttons, Ctrl and the mouse wheel, or two fingers. Choose a tool in the toolbar, then tap the page where the item goes, or press Place on the page to put it in the middle of the page in view. A tool places one item and goes back to Select; double-click a tool, or press and hold it, to keep it for several.

  • Text: type straight onto the page. Sans, Serif or Mono, 6–144 pt (12 by default), any colour, bold, italic (for English letters; Hindi stays upright), aligned left, centre or right, with the line spacing you choose. The box grows as you type up to the page's edge, then wraps; drag its side handle to wrap it at a width of your own. Enter starts a new line.
  • Edit text: outlines the text already on the page, a line or part of a line at a time, split where the font, size or colour changes. Tap a piece to type in it: the old words are taken out of the page and yours are set where they stood, in the nearest of Sans, Serif and Mono, with the size, colour, bold and italic of the original. Text in Arial, Helvetica, Times New Roman or Courier is set in a font of the same letter widths, so the line keeps its length. Clear the text, or delete the item, to delete the words from the page; Restore original text puts them back. A piece left as it read stays untouched. Text outlined with dashes cannot be edited, and a tap says why.
  • Sign: draw your signature on a pad, type your name in one of four handwriting styles, or upload a photo of it signed on white paper. A photo is cleaned up: the paper is made transparent so only the ink shows. Ink can be black or blue. A signature is placed 50 mm wide, initials 20 mm; resize either by its corners.
  • Image: a JPG, PNG, WebP, HEIC, GIF (its first frame), BMP, or AVIF where the browser reads it, placed at up to 33% of the page's width, with opacity.
  • Tick, Cross and Dot: marks 10 pt across, the size of a typical form box, in any colour.
  • Date: today's date as text, written as 28 February 2026, 28/02/2026 or 2026-02-28, and editable like any text.
  • Draw: freehand lines, 0.5–10 pt wide.
  • Highlight: drag across text and the highlight fits each line it crosses. The text beneath shows through it.
  • White-out: drag a box over what to cover. It is white; Match page colour takes the colour of the page around it, for a scan on grey or cream paper.
  • Shape: a rectangle, ellipse, line or arrow, with a line width of 0.5–20 pt, a fill and opacity.

Tap an item to change it in the panel beside the pages: drag it to move it, or use the arrow keys (Shift for bigger steps); drag a handle to resize it, or hold Alt with the arrow keys; turn it a quarter at a time, duplicate it (Ctrl+D), copy it to another page (Ctrl+C, then Ctrl+V on that page), bring it forward or send it back, or delete it. Every change can be undone (Ctrl+Z) and redone (Ctrl+Y). Save PDF makes the file, named as in form-edited.pdf.

A PDF with form fields says how many there are above the pages. Type in a text box, tick a checkbox, choose a radio button or pick from a list right where each field is on the page; Tab and Next field go from one to the next, and Highlight fields tints the ones you can fill. A field that holds one character per box, such as a PAN or PIN code, takes English letters and digits only, since a Hindi syllable is several characters. Fields the PDF marks read-only show their value and cannot be changed. A signature field opens Sign and places your signature inside it; it stays an unsigned field, since what is placed is an image of your signature.

Flatten, off unless you turn it on, makes the form fields and comments part of the page as they print, so they can no longer be changed and look the same in every app. Anything the PDF set not to print, such as an on-screen button, is left out; links keep working. Leave it off to send a form someone may still need to fill or check.

Your signature and initials can be kept for next time with Remember on this device, off unless you turn it on. They are then stored in this browser only; turning it off removes them.

How the PDF is changed

What you add is drawn on a layer of its own for each page you changed, then laid over that page as a reader shows it, so an item placed upright on a page that is stored sideways is upright in the saved PDF too. The pages themselves are not drawn again: their text, images, links and form fields are exactly as they were, and pages you did not touch are copied as they are.

Editing a page's own text is the one change made inside a page. A PDF draws text as a list of positioned letters, each in a font that usually holds only the letters the document uses, which is why new words cannot be typed in the original font. The letters of the piece you edit are taken out of that list, and each leaves a gap of its own width, so every other letter on the page stays exactly where it was. Your text is then drawn on the layer above, starting on the old baseline. For Arial and Helvetica that is Arimo, for Times New Roman Tinos and for Courier Cousine: fonts drawn so that each letter, digit and punctuation mark is exactly as wide as the original's, so unchanged words end where they did. Any other font gets the Noto font of the same kind, whose letters differ in width. The text is not fitted to the old width: longer text runs on past where the old words ended, and the editor shows what it overlaps before you save. Where several pages share the same content, as a letterhead often does, only the page you edited changes.

Text is set in Noto fonts, and your handwriting styles in their own, with only the letters you used included in the file. Hindi is shaped as a word processor shapes it, so conjuncts such as क्ष and त्र and vowel signs such as ि join as they should. Each letter is written so that copying or searching the saved PDF gives back the text as you typed it, even where a vowel sign is drawn before its consonant. A JPG goes into the PDF as it is, without its location and camera details; a photo far larger than its place on the page is reduced to 300 DPI at the size it is placed.

Form values are saved in the PDF's own fields, so another app shows them as values it can read and change, not as text laid on top. Each filled field also gets a new picture of its value, drawn in Noto Sans, so it looks the same in every app, Hindi included: a field that sets no font size is fitted to its box at 4 to 12 pt, a one-character-per-box field puts each character in its own box, and a checkbox shows the form's own tick, or a plain one where the form has none. Fields you did not touch keep the look they had. A form's scripts are not run, and a form built for Adobe's XFA has its XFA copy taken out, so every app shows the standard fields you filled.

Signatures and the law in India

Sections cited from the Information Technology Act, 2000, as published on India Code:

  • Section 2(1)(ta): an electronic signature is authentication of an electronic record by a subscriber by means of the electronic technique specified in the Second Schedule, and includes a digital signature.
  • Section 3(2): authentication by digital signature is effected by an asymmetric crypto system and hash function.
  • Section 1(4) and the First Schedule: the Act does not apply to a trust, a will, a negotiable instrument or a power of attorney. Within those, it does apply to a cheque, to a demand promissory note or bill of exchange issued in favour of or endorsed by an entity regulated by the Reserve Bank of India, National Housing Bank, SEBI, IRDAI or PFRDA, and to a power of attorney that empowers such an entity to act for the person executing it. The Central Government can change the Schedule by notification.

Sources

Reviewed

Frequently asked questions

Yes, with Edit text: tap a line and type. The new words are set in a similar font, not the original one, so an edited line can look slightly different from its neighbours, least so in Arial, Helvetica, Times New Roman and Courier, which have stand-ins of the same widths. Some text cannot be edited this way: a scanned page, which is a picture (even one with a searchable text layer); text drawn as shapes; text set at a slant; text in other scripts, such as Tamil or Chinese; and old Hindi fonts such as Kruti Dev, whose text is stored as English letters. For those, cover the old words with White-out, using Match page colour on a tinted page, and type over it with Text. Hindi in a PDF made elsewhere often reads back with its letters out of order, so check an edited Hindi line before saving.
From the page, yes: text deleted with Edit text is taken out of the page's content, not covered, so it cannot be selected, copied or found there. The same words may be stored elsewhere in the file, such as a bookmark, a form field's value, the document's title or the hidden labels a screen reader reads, and those are left as they are. This tool does not search the file for them.
No. It covers what is beneath, so the page looks clean, but the text underneath stays in the file: it can still be selected, copied and found by search. Do not use it to hide anything confidential; delete the words with Edit text where it can.
Yes. Most scanned and printed forms have none: place Text on each line, a Tick or Cross in each box, and Date and Sign at the foot.
No. Under the Information Technology Act, 2000, an electronic signature is authentication by a technique the Act specifies, and a digital signature is made with an asymmetric crypto system and hash function: a certificate and a key, which an image of a signature is not. A signature placed here is a picture of your signature on the page, as a scanned signed page is; it does not lock the PDF or prove who signed. The Act does not apply at all to trusts, wills, most negotiable instruments other than cheques, and most powers of attorney. Whether a picture of a signature is enough for a document is up to whoever asked for it.
Totals and other worked-out values come from scripts in the form, which this tool does not run, for safety and because they work differently in every app. The tool says so when a form has them: type each total in yourself.
A little. Text adds only the letters used from each font, drawn signatures and shapes are a few lines of drawing, and an image adds about its own size. If the saved file is over an upload limit, continue with Compress PDF.
No. Your browser reads, edits and saves the files on your device; they are not sent to CornerTools or anyone else, and neither is a password you type. To check, open the browser's developer tools at the Network tab and add a PDF: no request carries it. The PDF engine downloads from this site the first time you use it: a download to your browser, not an upload of your file.

See also