---
title: "Add watermark for local workbook with Swift in Cloud"
description: "Cloud APIs & SDKs for adding watermark for Microsoft Excel & OpenOffice Calc with Swift. Adding watermark for local spreadsheets by the Cells Cloud API SDK for Swift."

---

# Add watermark for local workbook with Swift in Cloud


> Cloud APIs & SDKs for adding watermark for Microsoft Excel & OpenOffice Calc with Swift. Adding watermark for local spreadsheets by the Cells Cloud API SDK for Swift.





















































.progLangContainer {
padding-right: calc(var(--bs-gutter-x)*.1);
padding-left: calc(var(--bs-gutter-x)*.1)
}
.progLangContainer {
padding-right: calc(var(--bs-gutter-x)*.1);
padding-left: calc(var(--bs-gutter-x)*.1);
margin: 5px;
margin-right: 20px;
}
.progLangPlace .progLangContainer .progLang {
color: #fff;
text-decoration: none;
height: 75px;
width: 75px;
text-align: center;
line-height: 65px;
border-radius: 100%;
font-size: 14px;
font-weight: 700;
border: 5px solid #e5e5e5;
box-shadow: 0 15px 8px -5px #666;
display: inline-block;
direction: ltr !important;
margin-bottom: 15px
}
.progLangPlace .progLangContainer .progLang:hover {
border: 7px solid #e5e5e5;
box-shadow: none
}
.progLangPlace .progLangContainer .bigFont {
font-size: 16px !important;
}
.progLangPlace .progLangContainer .selected {
border: 0 solid #e5e5e5;
box-shadow: 0 10px 8px -5px #666, inset 0 0 0 2px #063c72, inset 0 0 0 5px #fff;
cursor: initial !important;
pointer-events: none
}
.progLang:hover {
border: 7px solid #e5e5e5;
box-shadow: none
}
.progLang {
color: #fff;
text-decoration: none;
height: 75px;
width: 75px;
text-align: center;
line-height: 65px;
border-radius: 100%;
font-size: 14px;
font-weight: 700;
border: 5px solid #e5e5e5;
box-shadow: 0 15px 8px -5px #666;
display: inline-block;
direction: ltr !important;
margin-bottom: 15px
}
.pythonColor {
background: #4a59ce !important;
}
.javaColor {
background: #a499f2 !important;
}
.csColor {
background: #42dbb0 !important;
}
.cppColor {
background: #008594 !important;
}
.phpColor {
background: #ca75d7 !important;
}
.rubyColor {
background: #09e !important;
}
.nodeColor {
background: #519e8a !important;
}
.swiftColor {
background: #a2d270 !important;
}
.goColor {
background: #48d9ee !important;
}
.perlColor {
background: #5c9fea !important;
}
.curlColor {
background: #aeae61 !important;
}
.cellsp {
display: block;
color: #fff;
margin-block-start: 1em;
margin-block-end: 1em;
margin-inline-start: 0px;
margin-inline-end: 0px;
}
.cellsh2, .cellsh1 {
margin-top: 0 !important;
margin-bottom: .5rem !important;
font-weight: 500 !important;
line-height: 1.2 !important;
}
@media (max-width: 868px){
.pf-landing-page-com .header1.minify-header .cellsrow {
display: flex!important;
align-items: center!important;
flex-flow: unset!important;
}
.data-nosnippet{
display:none;
}
.pt-5, .py-5{
padding-top:0px !important;
}
.col-lg-12 .pt-5 .cellsh2{
font-size:18px !important;
margin-top:10px !important;
margin-bottom:10px !important;
}
}
# Swift API to add watermark for local Microsoft Excel and OpenOffice Calc spreadsheet
## Swift library to add watermark for local Microsoft Excel and OpenOffice Calc spreadsheet
Use Cells Watermark REST API to add watermark for local Microsoft Excel and OpenOffice Calc spreadsheet workflows in Swift. This professional solution add watermark for Microsoft Excel and OpenOffice Calc spreadsheet online using Swift.
[C#](/cells/net/background/Add-watermark/)
[Java](/cells/java/background/Add-watermark/)
[Python](/cells/python/background/Add-watermark/)
```
[PHP](/cells/php/background/Add-watermark/)
[Go](/cells/go/background/Add-watermark/)
[Node](/cells/nodejs/background/Add-watermark/)
[Ruby](/cells/ruby/background/Add-watermark/)
[Perl](/cells/perl/background/Add-watermark/)
```
.cells_bg_white {
}
@media (max-width: 868px){
.pf-landing-page-com .productfamilypage h2{
font-size:16px !important;
text-align:center !important;
}
.section-layout .heading-border{
font-size:20px !important;
}
}
@media (min-width:1200px){
.section-layout{
width:1170px;margin:0 auto;
line-height:28px;
}
}
```
## Add watermark for local Microsoft Excel and OpenOffice Calc spreadsheet - Swift REST API
```
.panelContainer {
width: 100%;
}
.cells-cloud-input-group {
display: flex;
margin: 15px auto 0;
border: 1px solid #eee;
border-radius: 10px;
background-color: #ffffff;
align-items: center;
justify-content: space-between
}
.cells-cloud-input-group-main {
flex-grow: 1;
display: inline-block;
padding: 0 4px;
color: #333;
display: inline-block;
}
.cells-cloud-input-group-prepend {
display: inline-block;
height: 52px;
border-radius: 10px 0 0 10px;
padding: 0 20px;
background-color: #e3e3e8;
color: #333;
line-height: 50px
}
.cells-cloud-input-group-method {
float: left;
padding-right: 4px;
color: #ccc;
}
.cells-cloud-input-group-main {
display: inline-block
}
.cells-cloud-input-group-append {
float: right;
}
.cells-cloud-link-button {
display: inline-block;
border: 1px solid transparent;
border-left: 1px solid #e3e3e8;
border-radius: 10px 10px 10px 10px;
padding: 0 20px;
outline: none;
box-shadow: none;
background-color: #1a89d0;
text-align: center;
vertical-align: middle;
color: #151617;
line-height: 20px;
font-size: 1rem;
font-weight: 400;
}
.cells-api-text{
text-align: center;
vertical-align: middle;
color: #151617;
line-height: 50px;
font-size: 1rem;
margin: 0 auto;
width: fit-content;
font-weight: 400;
}
.cells-cloud-action-button {
display: inline-block;
width: 100%;
border: 1px solid transparent;
border-left: 1px solid #e3e3e8;
border-radius: 10px 10px 10px 10px;
padding: 0 20px;
outline: none;
box-shadow: none;
text-align: center;
vertical-align: middle;
line-height: 50px;
font-size: 1rem;
margin: 0 auto;
width: fit-content;
font-weight: 400;
}
@media (max-width: 868px){
.cells-cloud-input-group-prepend,.cells-cloud-input-group-method{
display:none !important;
}
.cells-cloud-input-group-main{
padding:0px !important;
}
.spanclass{
float: left;
width: 70%;
overflow: hidden;
}
}
API 
POST 
https://api.aspose.cloud/v3.0/cells/watermark
Try it 
Adding watermark for a local spreadsheet with Swift is a complex task. Adding watermark for a local spreadsheet transitions is performed by our Swift SDK while maintaining the source spreadsheet's main structural and logical content. Our Swift library is a professional solution to adding watermark for local spreadsheets online. This Cloud SDK gives Swift developers powerful functionality and perfect API.
### Code example in Swift using REST API to add watermark for local spreadsheets
```
```
console.log("")
var codeconent = document.getElementById('code-convert');
codeconent.innerHTML = "";
const originalContent = "";
let dynamicReplacement = "";
function updateDynamicContent(value) {
dynamicReplacement = value;
updateDisplay();
}
function updateDisplay() {
const modifiedContent = originalContent.replace(/Book1\.xml/g, dynamicReplacement);
```
console.log(modifiedContent);
```
codeconent.innerHTML = modifiedContent;
}
.section-list{
}
.section-list ul{
display: flex;
flex-direction: row;
justify-content: space-between;
padding: 0px;
}
.section-list li{
list-style: none;
width: 27%;
line-height: 34px;
padding: 15px;
border-radius: 5px;
padding-top: 25px;
padding-bottom: 25px;
font-weight: bold;
word-break: break-all;
display: inline-block;
border: 1px dashed;
margin-bottom: 20px;
margin-right: 0px;
}
.section-list svg{
margin-top: -20px;
margin-left:1%;
margin-right:1%;
}
.heading-border{
font-size:28px !important;
width:100% !important;
padding-bottom:20px;
}
@media (min-width: 1200px){
.howtosection{
width: 1170px !important;
margin:0 auto !important;
}
.olstyle{
width: 1170px !important;
margin:0 auto !important;
}
```
}
```
@media (max-width: 868px){
.olstyle h2{
font-size:20px !important;
}
}
.olstyle ol{
list-style-type: none;
margin-right: 0;
margin-bottom: 0;
margin-left: 16px;
padding-top: 0;
padding-right: 0;
padding-bottom: 0;
padding-left: 30px;
}
.olstyle li{
margin-right: 0 !important;
line-height: 30px;
position: relative;
margin-bottom: 10px;
font-size: 18px;
}
.olstyle li a{
font-weight:bold;
text-decoration: underline !important;
}
.olstyle li::before{
position: absolute;
left: -30px;
top: 5px;
display: block;
background: #006bb0;
width: 20px;
height: 20px;
color: #fff;
text-align: center;
line-height: 20px;
font-size: 12px;
font-weight: 700;
border-radius: 10px;
}
```
.olstyle li:nth-child(1):before {
content: "1"
```
}
.olstyle li:nth-child(2):before {
content: “2”
}
.olstyle li:nth-child(3):before {
content: “3”
}
.olstyle li:nth-child(4):before {
content: “4”
}
.olstyle li:nth-child(5):before {
content: “5”
}
.olstyle li:nth-child(6):before {
content: “6”
}
.olstyle li:nth-child(7):before {
content: “7”
}
```
## How to use Swift API to add watermark
```
- Create an account at [Dashboard](https://dashboard.aspose.cloud/) to get free API quota & authorization details
- Initialize CellsApi with Client Id, Client Secret, Base URL & API version
- Call PostWatermark method to get the resultant stream
```
```
.section-list{
}
.section-list ul{
display: flex;
flex-direction: row;
justify-content: space-between;
padding: 0px;
}
.section-list li{
list-style: none;
width: 27%;
line-height: 34px;
padding: 15px;
border-radius: 5px;
padding-top: 25px;
padding-bottom: 25px;
font-weight: bold;
word-break: break-all;
display: inline-block;
border: 1px dashed;
margin-bottom: 20px;
margin-right: 0px;
}
.section-list svg{
margin-top: -20px;
margin-left:1%;
margin-right:1%;
}
.heading-border{
font-size:28px !important;
width:100% !important;
padding-bottom:20px;
}
@media (min-width: 1200px){
.howtosection{
width: 1170px !important;
margin:0 auto !important;
}
.olstyle{
width: 1170px !important;
margin:0 auto !important;
}
```
}
```
@media (max-width: 868px){
.olstyle h2{
font-size:20px !important;
}
}
.olstyle ol{
list-style-type: none;
margin-right: 0;
margin-bottom: 0;
margin-left: 16px;
padding-top: 0;
padding-right: 0;
padding-bottom: 0;
padding-left: 30px;
}
.olstyle li{
margin-right: 0 !important;
line-height: 30px;
position: relative;
margin-bottom: 10px;
font-size: 18px;
}
.olstyle li a{
font-weight:bold;
text-decoration: underline !important;
}
.olstyle li::before{
position: absolute;
left: -30px;
top: 5px;
display: block;
background: #006bb0;
width: 20px;
height: 20px;
color: #fff;
text-align: center;
line-height: 20px;
font-size: 12px;
font-weight: 700;
border-radius: 10px;
}
```
.olstyle li:nth-child(1):before {
content: "1"
```
}
.olstyle li:nth-child(2):before {
content: “2”
}
.olstyle li:nth-child(3):before {
content: “3”
}
.olstyle li:nth-child(4):before {
content: “4”
}
.olstyle li:nth-child(5):before {
content: “5”
}
.olstyle li:nth-child(6):before {
content: “6”
}
.olstyle li:nth-child(7):before {
content: “7”
}
```
## System Requirements
```
- macOS Monterey 12.4
- Swift 4.2
```
```