There are dozens of free online text tool collections. This comparison looks at the most commonly used ones in 2026 — TextUtils, Convertcase, and OnlineTextTools — focusing on what actually matters for everyday use: privacy, tool coverage, speed, and whether you need an account.
What to look for in a text tool site
Not all "free" text tool sites are equal. The key questions to ask are: Does the tool process text server-side (sending your content to someone's server)? Is the site plastered with intrusive ads that fire before you can use the tool? Does it require an email sign-up? And critically — does it actually work on mobile?
TextUtils
TextUtils (textutils.app) is built on a strict client-side-only principle: every tool runs entirely in your browser using JavaScript. Your text is never transmitted to any server. This is not a marketing claim — the codebase has no text-processing API endpoints. The tools include case converters, JSON formatter, Base64 and URL encoders/decoders, hash generator (MD5, SHA-1, SHA-256), text diff checker, reading time calculator, line counter, slug generator, and lorem ipsum generator. No account required, no signup walls, no paywalls.
Best for: Developers and writers who handle sensitive or proprietary content and want a guaranteed private tool. The terminal-aesthetic UI is built for people who live in code editors.
Convertcase
Convertcase.net is one of the oldest and most visited text conversion sites. It specializes in case conversion (uppercase, lowercase, title case, sentence case, alternating case, inverse case) and does this well. Processing is client-side for its core conversions. The UI is minimal and loads fast. It does not cover encoding, formatting, or hashing tools.
Best for: Quick case conversion of a piece of text when you only need that specific operation.
OnlineTextTools
OnlineTextTools.com (part of the Browserling suite) offers a very large number of text utilities — over 100 tools covering string manipulation, encoding, generation, and analysis. It's comprehensive. However, some tools require a paid account to use, and the ad-heavy UI can be disorienting. Text processing for most tools appears to be client-side, but the site's privacy policy is broad.
Best for: Finding obscure text manipulation operations that aren't covered by smaller tool sites.
Comparison table
| Feature | TextUtils | Convertcase | OnlineTextTools |
|---|---|---|---|
| Client-side only | Yes (guaranteed) | Yes (core tools) | Mostly |
| No signup required | Yes | Yes | Partial |
| Hash generator | Yes (MD5/SHA-1/SHA-256) | No | Yes |
| Text diff checker | Yes | No | Yes |
| JSON formatter | Yes | No | Yes |
| Mobile-friendly UI | Yes | Yes | Partially |
Our recommendation
For everyday use and sensitive content — code snippets, API keys, configuration files, proprietary text — choose a tool that processes everything in the browser. TextUtils is purpose-built for this use case and covers the tools developers and writers actually reach for most often: case conversion, encoding/decoding, hashing, JSON formatting, and text analysis.
For edge-case operations not covered by smaller tool sites, OnlineTextTools has breadth — just be selective about which tools you use with sensitive data.
Browse all 18 tools available on TextUtils at textutils.app/tools.