filemarkr
All ToolsGuides
filemarkr

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
  • CSV to JSON
  • JSON to YAML

Encode & Decode

  • Base64 Encode / Decode
  • Base64 to Image
  • Image to Base64
  • URL Encode / Decode
  • HTML Entity Encoder
  • JWT Decoder

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 →

Explore

  • All Tools
  • JSON Formatter
  • JWT Decoder
  • Diff Checker
  • UUID Generator

Company

  • About
  • Privacy
  • Terms
  • Sitemap

Our Promise

  • 100% in your browser
  • Zero uploads
  • No sign-up, always free

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

All tools

Reverse Text

Reverse a string by characters, words or whole lines.

100% private Instant, in-browser Read the guide
Loading the tool…

Reverse Text by Character, Word, or Line

This reverse text tool flips a string so it reads back to front, with control over the granularity. Reverse the individual characters to turn hello into olleh, reverse the order of words while keeping each word intact, or reverse whole lines so the last row becomes the first. It is a quick utility for developers testing string handling, building palindrome checks, generating novelty text, or reordering a list without retyping it.

How it works

The reversal runs entirely in your browser with JavaScript. When you paste text and pick a mode, the tool processes the characters, words, or lines locally and shows the result immediately, with nothing sent to a server. It handles multi-line input and preserves your spacing within each unit, so word and line modes stay predictable even on large blocks of text. You can switch between modes at any time and the output refreshes instantly, so there is no waiting and no need to reload the page between runs.

Practical use cases

  • Check whether a phrase is a palindrome by comparing input and output
  • Reverse a list of lines to flip chronological or ranked order
  • Create mirrored or backwards text for puzzles and design mockups
  • Test how your code handles reversed Unicode or edge-case strings

Working with lines often pairs well with other utilities: Sort Text Lines to reorder alphabetically, Remove Duplicate Lines to dedupe, or the Case Converter to change letter casing.

Everything happens in-browser, so your text is never uploaded, logged, or shared. The tool is completely free, needs no sign-up, and runs in any modern browser, including on mobile, making it safe for private or throwaway text alike.

Frequently asked questions

You can reverse by characters, by words while keeping each word readable, or by lines to flip the order of rows in a list or block of text.

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.

Slug Generator

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