Text Tools
Compare, merge, and convert text directly in your browser — no signup, no upload, no install. Diff two blocks of text or code side-by-side, resolve every change with a full merge workflow, and convert between UPPERCASE, camelCase, snake_case, and more. Every tool runs entirely on your device, so your data stays private and results appear instantly, even for large files.
Text Merge Tool
Compare and merge any text file side-by-side. Accept, reject, or combine changes and download the merged result.
Open Text Merge ToolCase Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more.
Open Case ConverterText Tools - When to use ?
Three focused tools, each built for a specific step in working with text.
Text Compare
Compare two blocks of text and highlight additions and removals.
You need to spot every difference between two versions of the same text, code, or document.
- Line, word, or character-level diff granularity
- Ignore case and ignore whitespace toggles
- Upload a file or paste directly
- Handles large documents smoothly
Text Merge Tool
Compare and merge any text file side-by-side. Accept, reject, or combine changes and download the merged result.
You have two versions of a file and need to combine them into one, keeping the changes you want from each.
- Accept Left, Accept Right, Accept Both, or Reject per change
- Works with any plain text file — code, config, docs
- Syntax highlighting based on file extension
- Download the merged result with the original filename
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more.
You need to convert a variable name, heading, or string between naming conventions or capitalization styles.
- UPPERCASE, lowercase, Title Case, Sentence case
- Developer formats: camelCase, PascalCase, snake_case, kebab-case
- Chain multiple conversions with Undo/Redo
- Copy or download the converted text
Everything You Need to Work with Text
One consistent toolkit for the text tasks developers reach for most often — all free, all client-side.
Fast Browser Processing
Diffing, merging, and case conversion all run locally in JavaScript — no round trip to a server.
Data Never Leaves Your Browser
Your text is processed on-device and never uploaded anywhere.
Compare Text & Code
Diff two blocks of text line by line and spot every addition or removal.
Character & Word Level Diff
See exactly which characters or words changed inside a modified line, not just which lines.
Merge & Resolve Changes
Accept left, right, both, or reject each change, then merge everything at once.
Convert Text Case
Switch between UPPERCASE, camelCase, snake_case, kebab-case, and more.
Copy Result
Copy compared, merged, or converted output to your clipboard in one click.
Download Result
Save output as a standalone text file for your project or docs.
What is Text Comparison & Merging?
Working with text usually comes down to three recurring tasks: figuring out what changed between two versions, deciding which changes to keep, and reshaping text into the format a language, framework, or style guide expects.
"Diffing" (comparing) two blocks of text means lining them up and highlighting every addition, removal, and change — at the line, word, or character level. It answers what's different without touching either version. "Merging" goes a step further: it takes that same comparison and lets you act on every difference, accepting or rejecting each change to produce a single, final file.
Case conversion is a different problem entirely — reshaping the same content into a different naming convention or capitalization style, like turning a sentence into camelCase for a variable name, or snake_case for a database column, without changing the underlying words.
Developers reach for these tools constantly: reviewing a diff before a pull request, reconciling a config file edited in two places, or renaming a field to match a language's naming convention. Doing any of this by hand is slow and error-prone, which is why a dedicated compare, merge, or case-conversion tool is a routine part of working with code, config, and content.
Where Text Tools Are Used
Comparing, merging, and converting text shows up across nearly every part of building software.
Code Review
Spot every line changed in a pull request or patch before merging.
Documentation
Compare drafts of a README, changelog, or release notes.
Config Migration
Reconcile a config file edited locally with an updated version from a teammate.
Log Analysis
Diff two log exports to see what changed between requests or deployments.
Naming Conventions
Convert variable and field names between camelCase, snake_case, and kebab-case.
Localization
Compare translation files and spot missing or changed keys.
Legal & Contracts
Track wording changes between two versions of a document.
Merge Conflicts
Resolve conflicting edits between two branches or authors without a git client.
A Typical Text Workflow
How these tools fit together when you're reconciling two versions of the same file.
- 1
Paste or Upload
Add the original and modified text, or drop a file.
- 2
Compare
See every addition, removal, and change highlighted.
- 3
Resolve Changes
Accept left, right, both, or reject each change.
- 4
Convert Case
Switch naming convention or capitalization if needed.
- 5
Copy / Download
Grab the result for your code, docs, or tests.
Case Conversion Examples
The same string, converted into every case the tools above support.
Hello World Example
HELLO WORLD EXAMPLE
hello world example
Hello World Example
helloWorldExample
HelloWorldExample
hello_world_example
hello-world-example
Why PayloadTools?
Browser Processing
Every tool runs client-side, entirely on your device.
No Server Upload
Your text is never transmitted to or stored on a server.
Fast
Results appear instantly, even for large documents.
Free Forever
No paywalls, tiers, or usage limits.
Mobile Friendly
Fully usable on phones and tablets, not just desktop.
Unlimited Usage
No account, no rate limits, no watermarks.
Modern UI
A clean, fast interface built for daily developer use.
Frequently Asked Questions
Common questions about text comparison, merging, and case conversion.
Related Text Resources
In-depth guides on text diffing and naming conventions, coming soon.
Text Diff Algorithms Explained
How line, word, and character-level diffing actually works under the hood.
camelCase vs snake_case vs kebab-case
When to use each naming convention across languages and file formats.
How to Resolve Merge Conflicts
A practical walkthrough of accepting, rejecting, and combining conflicting changes.
Character vs Word vs Line Diff
Choosing the right diff granularity for code, prose, and short strings.
Naming Convention Style Guide
Common casing conventions used by popular languages and frameworks.
Text Compare Best Practices
Tips for reviewing large diffs without missing what matters.