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60+ free developer tools that run entirely in your browser — JSON formatter, JWT decoder, Base64, diff checker, regex tester, hash generator and more. No upload, no sign-up, completely private.

JSON & Data

  • JSON Formatter
  • JSON Minifier
  • JSON Validator
  • JSON to CSV
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Encode & Decode

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  • Base64 to Image
  • Image to Base64
  • URL Encode / Decode
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Text Tools

  • Text Diff Checker
  • Case Converter
  • Word & Character Counter
  • Slug Generator
  • Remove Duplicate Lines
  • Sort Text Lines

Generators

  • UUID Generator
  • Password Generator
  • Lorem Ipsum Generator
  • QR Code Generator
  • Random Number Generator
  • NanoID Generator

Popular Guides

  • How to Format and Pretty-Print JSON (Without Breaking It)
  • How to Minify JSON and Shrink Your API Payloads
  • How to Validate JSON and Pinpoint the Exact Syntax Error
  • How to Convert JSON to CSV for Excel and Google Sheets
  • How to Convert CSV to JSON (With Proper Header Detection)
  • All guides →

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© 2026 filemarkr. Designed & developed by Naved Naik.  All processing happens locally in your browser.

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Slug Generator

Turn any title into a clean, URL-safe slug for pages and posts.

100% private Instant, in-browser Read the guide
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Turn any title into a clean URL slug

The Slug Generator converts a title or phrase into a tidy, URL-safe slug: lowercase, words joined by hyphens, accents flattened, and punctuation and unsafe characters removed. A good slug makes URLs readable, shareable, and friendlier for search engines. Rather than hand-cleaning a heading into a permalink, you paste the text and get a slug ready to drop into a route, blog post, or documentation page.

How it works

The slug is generated locally in your browser with JavaScript. The tool lowercases your text, replaces spaces and separators with hyphens, transliterates accented characters where possible, and strips anything that is not URL-safe. Because nothing is uploaded, you can generate slugs for unpublished pages or private projects and know the input stays on your device.

Practical use cases

  • Create permalinks for blog posts and articles.
  • Build clean route paths for pages and documentation.
  • Generate consistent identifiers for CMS entries.
  • Normalize product or category names into stable URLs.

The Case Converter is useful when you also need a matching identifier style, while the URL Encode / Decode tool handles query strings and encoding. When you are finalizing a page, the Meta Tag Generator helps round out its SEO markup.

Private by design

All processing happens in-browser, so no data is uploaded and nothing is stored. The tool is free, requires no account, and works on all modern browsers including mobile. Close the tab and your text is gone completely.

Frequently asked questions

The tool lowercases text, replaces spaces with hyphens, removes punctuation and symbols, and transliterates accents, leaving only characters that are safe in a URL path.

Related tools

Text Diff Checker

Compare two blocks of text and highlight every difference line by line.

Case Converter

Convert text between camelCase, snake_case, kebab-case, Title Case and more.

Word & Character Counter

Count words, characters, sentences, lines and reading time as you type.

Remove Duplicate Lines

Strip duplicate lines from a list, with optional sorting and trimming.