eSign OTT Documents online - secure Digital Signature

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Electronic signatures and digital certificates allow to sign OTT document with eSign application. Note, the signed OTT document keeps signatures as supported document elements, such as text, labels, stickers, images, hidden metadata information and digital certificates that verifies document content. The OTT document signed with digital certificates could be verified for any changes of its content. If there were some changes made to signed document then verification process will detect it and certificates will be not valid. To add various electronic signatures, you need to select one or more OTT documents, then in application select one from the existing signature templates like Text Stamps, Images, Handwritten signatures, Barcode, QR Code or digital certificate to sign, drag the signatures across the document pages. The documents are stored in a secure storage. You can upload it from any platform, mobile or another device, on any Windows, MacOs, Linux or Android platform. We support any browser and provide generation of any digital signatures, metadata signatures or certificates. No registration is required. All files are processed on our servers so no additional plug-ins or software installations.

Protect document with digital signatures.
Support any document format as PDF, DOCX, XLSX, PPTX, RTF, ODS, OTS, ODP, JPEG, PNG, GIF, and many more!
Sign PDF documents with digital certificates and various electronic signatures.
Sign Microsoft and Open Office documents from browsers.

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OTT

Open Document Template

Files with OTT extension represent template documents generated by applications in compliance with the OASIS' OpenDocument standard format. These are created with word processor applications such as free OpenOffice Writer and can hold settings that can be used to generate new documents from these template files. These settings include page margins, borders, headers, footers, and other page settings. Such templates are used in official documents such as company letterheads and standardized forms.

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How it works

How to sign OTT document with digital signature?

Step1

Select your OTT document for signing.

Step2

For signing your OTT document first select sign type (Digital, Text, Barcode, Image, Stamp, QR-code).

Step3

Сlick 'Sign document and download result' button.

Step4

Get your signed document from browser downloads.

FAQ

Questions & Answers

What is digital signature?

The digital signature is an electronic artifact on the document which could be a simple document element like a text, stamp, image or could be a more complicated digital certificate that verifies the document signer and checks that document data was not changed after its signing.
How to create a digital signature?

Once you will upload the document from this page, you will be redirected to the document editor where you will need to pick the signature type that could be text, image, stamp, barcode, QR code or digital certificate. When the signature type is selected you can click [Add] button to create a new digital signature of the proper type. Text signature requires only text and adjusting its style. Image signature requires the image to be uploaded. Barcode or QR code signature requires text. The digital certificate will need a special pfx certificate file to create the documen signature.
How to sign a OTT document?

The document could be signed with many electronic signatures of the different types. The signatures could be added to the document page and then could be saved. Some documents support only simple electronic elements like text and images. Many documents formats support digital certificates that allow protecting content from unexpected changes.
How to add signature?

Simple digital signatures, like text and images, could be located on the document page to provide a visual signature confirmation. When the document was uploaded to the editor the signatures from the toolbox could be dragged to the document page and pointed to a specific area. The digital certificate could have no visual representation but be embedded into the document and protect it from unexpected changes.
How to verify a signature in OTT document?

The digital signature on the document could be verified visually or automatically. Visual verification is efficient for text, stamps, handwritten signatures, watermarks. The automatic verification could tell hidden information about the document signer and protect the document from unexpected changes. The Barcode and QR code signatures allow automate document verification process. Digital certificates could protect highly important documents from unauthorized changes.

Other Signature file formats

You can also sign other file formats. Please see the list below.

BMP
Bitmap Image File
CDR
CorelDRAW Image File
CMX
CorelDRAW Metafile Exchange Image File
CSV
Comma Separated Values File
DOC
Microsoft Word Document
DOCM
Word Open XML Macro-Enabled Document
DOCX
Microsoft Word Open XML Document
DOT
Word Document Template
DOTM
Word Open XML Macro-Enabled Document Template
DOTX
Word Open XML Document Template
GIF
Graphical Interchange Format File
JPEG
JPEG Image
JPG
JPEG Image
ODP
OpenDocument Presentation
ODS
OpenDocument Spreadsheet
ODT
OpenDocument Text Document
OTP
OpenDocument Presentation Template
OTS
OpenDocument Spreadsheet Template
PDF
Portable Document Format File
PNG
Portable Network Graphic
POTM
PowerPoint Open XML Macro-Enabled Presentation Template
POTX
PowerPoint Open XML Presentation Template
PPS
PowerPoint Slide Show
PPSM
PowerPoint Open XML Macro-Enabled Slide
PPSX
PowerPoint Open XML Slide Show
PPT
PowerPoint Presentation
PPTM
PowerPoint Open XML Macro-Enabled Presentation
PPTX
PowerPoint Open XML Presentation
RTF
Rich Text Format File
SVG
Comma Separated Values File
TIF
Tagged Image File
TIFF
Tagged Image File Format
WEBP
WebP Image
WMF
Windows Metafile
XLS
Excel Spreadsheet
XLSB
Excel Binary Spreadsheet
XLSM
Excel Open XML Macro-Enabled Spreadsheet
XLSX
Microsoft Excel Open XML Spreadsheet
XLTM
Microsoft Excel Macro-Enabled Template
XLTX
Excel Open XML Spreadsheet Template

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