Use-case online tools

Online Text Cleanup Tools

A focused text workspace for comparing drafts, reviewing changes, cleaning logs, deduping lists, counting characters, and quick analysis.

text diff compare text online character count duplicate lines10 tools

Useful For

Compare draft and final text side by side

Convert HTML to Markdown

Remove duplicate list items

Mask private data in logs

Which Tool Should I Use?

Text Diff CheckerChoose this when you need to handle: Compare two texts or text files online with a GitHub-style side-by-side diff, word highlights, whitespace/case options, and patch download.Try an example first, then check real values, units, and whether the output should be shared.HTML to Markdown ConverterChoose this when you need to handle: Convert blog, docs, and email HTML snippets into Markdown for GitHub, Notion, and README files.Try an example first, then check real values, units, and whether the output should be shared.Markdown PreviewChoose this when you need to handle: Preview Markdown as HTML and copy the rendered HTML output.Try an example first, then check real values, units, and whether the output should be shared.Character CounterChoose this when you need to handle: Count characters, bytes, words, and lines instantly.Try an example first, then check real values, units, and whether the output should be shared.Text CleanerChoose this when you need to handle: Clean extra spaces, tabs, and blank lines from pasted text.Try an example first, then check real values, units, and whether the output should be shared.

Tools In This Set

Text Diff CheckerCompare two texts or text files online with a GitHub-style side-by-side diff, word highlights, whitespace/case options, and patch download.HTML to Markdown ConverterConvert blog, docs, and email HTML snippets into Markdown for GitHub, Notion, and README files.Markdown PreviewPreview Markdown as HTML and copy the rendered HTML output.Character CounterCount characters, bytes, words, and lines instantly.Text CleanerClean extra spaces, tabs, and blank lines from pasted text.Duplicate Line RemoverRemove duplicate lines from a list while preserving the first occurrence.Line SorterSort multiline text alphabetically, reverse alphabetically, or by line length.Word Frequency AnalyzerFind repeated words, unique word count, and top keywords in pasted text.Case ConverterConvert text into upper, lower, camel, snake, kebab, and title case.Privacy Data Masking ToolMask phone numbers, emails, IDs, cards, accounts, IP addresses, and URL tokens in your browser.

Suggested Workflow

01Start with Text Diff CheckerCompare two texts or text files online with a GitHub-style side-by-side diff, word highlights, whitespace/case options, and patch download. Use an example first to understand the input and output format.

02Continue with HTML to Markdown ConverterConvert blog, docs, and email HTML snippets into Markdown for GitHub, Notion, and README files. Use related tools in the same set to avoid repeated manual work.

03Check with Markdown PreviewCopy the final output or reopen the example link to confirm the workflow.

Before You Use These Tools

Separate sensitive values before pasting

Logs, customer notes, and draft documents often include emails, phone numbers, tokens, addresses, or names. Mask sensitive values first, or test with a small sample before working with a full text block.

Separate cleanup from analysis

Whitespace cleanup, sorting, and duplicate removal change the source text, while character counts and word frequency help you understand it. If the original wording matters, analyze first and run destructive cleanup on a copy.

Compare drafts before cleaning them

For release notes, translations, config files, meeting notes, and product copy, compare the original and revised text side by side before changing the content. Ignore whitespace, ignore case, and compact change-only view help narrow the review to meaningful edits.

Share examples, not private text

Text tools are useful for explaining a workflow, but real documents and logs should not be placed in URLs. Share example states when available and process private text locally in each browser session.

FAQ

Is pasted text stored?

Text tools process input in the browser and do not store it by default.

Can I compare document or code changes?

Text Diff Checker shows original and revised text side by side with added, removed, changed, and word-level highlights.

Can I paste private logs or personal data?

Mask personal data first when possible, and avoid placing production secrets or sensitive source text in shared links.

Can it handle long text?

These tools work in browser memory and are best for pasted essays, notes, and log snippets rather than very large full-file analysis.