Add Suffix to Words

Add custom text, extensions, or tags to the end of every word.

Configuration

Input Text
0 / 0 Modified

Complete the Word: Suffix Power for Extensions & Tags

When managing hundreds of filenames, database fields, or word lists, adding consistent endings manually is tedious and error-prone. Need to add .jpg extensions to a list of image names? Want to pluralize every word (mechanically) with an "s"? Need to tag variables with _old or _backup for code versioning? These tasks take minutes when done one-by-one but are instant with bulk suffix processing.

The Add Suffix to Words tool automates word-ending modifications. It offers four wrapping styles (None, Brackets, Quotes, Custom), word filtering to skip short words, case transformation options, and file upload/download support. Whether you're organizing file libraries, creating versioned code copies, or formatting data exports, this tool processes thousands of words in seconds while preserving your document's spacing and line breaks.

Why Add Suffixes to Words?

  • File Management: Add extensions (.txt, .jpg, .pdf) to filename lists for batch file creation, library organization, or script automation.
  • Code Versioning: Append version markers (_old, _new, _backup, _v2) to variable names, function identifiers, or database column names during migrations.
  • Data Formatting: Add plural markers, category tags, or unit labels (kg, m, s) to word lists for database imports or CSV processing.
  • Batch Renaming Prep: Prepare file lists with consistent suffixes before running bulk rename scripts or folder reorganization operations.

Common Use Cases

File Library Organization

Add file extensions (.jpg, .png, .pdf) to lists of filenames for batch file creation. Perfect for photographers managing image libraries, designers organizing assets, or developers preparing file manifests for scripts.

Database Migrations

Append version suffixes (_v2, _old, _backup) to database column names during schema migrations. Create parallel table structures before deprecating old columns, ensuring safe rollback options.

Data Export Formatting

Add unit labels (kg, m, USD) or category tags to CSV export columns. Prepare data for import into analytics platforms, ERP systems, or e-commerce databases with consistent field naming.

Package Management

Add version numbers or environment tags (prod, dev, test) to package names, module identifiers, or npm package lists for dependency management and deployment automation.

See it in action

Before
photo1 photo2 photo3 photo4
After (Suffix: ".jpg")
photo1.jpg photo2.jpg photo3.jpg photo4.jpg

Professional Features

Custom Suffixes

Add any text, extension, or character combination to the end of every word. Supports emojis and special characters.

Wrapping Styles

Wrap words with **Brackets** [word], **Quotes** "word", or custom delimiters like <word> for structured formatting.

Word Filtering

Skip short words (articles, prepositions) by setting a minimum word length. Perfect for content-focused processing.

Case Transform

Preserve original casing, convert to UPPERCASE, or lowercase while adding suffixes for consistent formatting.

File Upload

Process entire files (.txt, .md, .csv) without copy-pasting. Download results instantly with one click.

Private & Secure

100% client-side processing. Your text never leaves your browser. No server uploads, no data tracking.

How to use this tool

1

Input Text

Paste words or upload a file to begin processing.

2

Set Suffix

Enter your suffix (.txt, s, _new, etc.) and choose wrapping style.

3

Configure Options

Enable filtering, set case transform, customize wrappers.

4

Copy Result

Copy the formatted text or download as a new file.

Frequently Asked Questions

How do I add file extensions to a list of filenames?
Simply enter the extension (like ".txt" or ".jpg") in the Suffix Text field. The tool will instantly add the extension to the end of every word, converting "image photo document" into "image.txt photo.txt document.txt".
What are wrapping styles?
Wrapping styles let you surround each word with delimiters. **Brackets** mode wraps words like [word+suffix], **Quotes** mode creates "word+suffix", and **Custom** mode lets you define your own opening and closing characters like <word+suffix>.
Can I pluralize words mechanically?
Yes, enter "s" as the suffix to add it to every word. Note this is mechanical—"cat" becomes "cats" but "box" becomes "boxs" (not "boxes"). For grammar-aware pluralization, you'd need advanced NLP tools.
Can I skip short words like "a", "is", "to"?
Yes! Enable the **Skip Short Words** option and set a minimum word length (e.g., 3). Words shorter than this length will not be modified, perfect for skipping articles and prepositions.
Does this preserve spacing and formatting?
Absolutely. The tool preserves all whitespace, line breaks, and text structure. It only modifies individual words (non-whitespace sequences) while keeping your document formatting intact.
Can I change the case of words while adding suffixes?
Yes. Use the **Case Transform** options to Preserve original casing, convert to UPPERCASE, or convert to lowercase while adding your suffix.
What counts as a "word" in this tool?
A "word" is any sequence of non-whitespace characters. This includes regular words, numbers, URLs, hyphenated terms, and punctuation-attached words like "don't" or "end."
Can I upload files?
Yes, click **Upload** to load .txt, .md, .csv, or .json files directly. The tool will process the file content and you can download the result with one click.
Is my data secure?
Completely. All text processing happens entirely in your browser using JavaScript. Your content never leaves your device and isn't sent to any server.
Is this tool free?
Yes, FreeTools Pro provides this utility 100% free forever, with no ads, no signup, and no limits.