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Instant, privacy-first browser utilities for image processing, PDF manipulation, developer tasks, text transformations, calculators, and converters.

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Find the right utility for your workflow across 14 specialized categories

Image Tools
31 Tools
PDF Tools
19 Tools
Text Tools
25 Tools
Developer Tools
20 Tools
SEO Tools
12 Tools
Calculators
10 Tools
Unit Converters
10 Tools
Security Tools
11 Tools
Color Tools
8 Tools
CSS Tools
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Base64 & Encoding
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Date & Time
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Miscellaneous
9 Tools

Most Popular Tools

The most frequently bookmarked tools by our users

Image Compressor

Compress JPG, PNG, and WebP images by up to 80% without losing quality.
Merge PDF

Combine multiple PDF files into one clean document instantly.
Word Counter

Count words, characters, sentences, paragraphs, and reading time in real time.
JSON Formatter

Format, validate, beautify, and minify raw JSON string inputs.
Password Generator

Generate secure, cryptographically random passwords with custom symbols.
QR Code Generator

Create custom QR codes for URLs, text, Wi-Fi, and contact details.
JPG to PDF

Convert JPG and PNG images into a clean single PDF file.
Case Converter

Convert text to UPPERCASE, lowercase, Title Case, camelCase, and snake_case.
Base64 Encoder

Encode text or images into standard Base64 format strings.
Percentage Calculator

Calculate percentage of values, percentage differences, and changes easily.
Color Picker

Pick colors from screen or image and export HEX, RGB, and HSL formats.
SERP Preview Tool

Simulate how your meta title and description appear in Google search results.

Why Choose TinyToolzz?

Built from the ground up for radical speed, privacy, and simplicity

Privacy First
Your files never leave your device. All processing occurs 100% locally in your web browser.
Lightning Fast
No server uploads or queues. Execution starts instantly and returns results in milliseconds.
Truly Free
No subscription tiers, daily task limits, or hidden paywalls. 100% free forever for everyone.
Works on Any Device
Fully optimized for smartphones, tablets, laptops, and desktop viewports.
150+ Tools
A complete utility suite for images, PDFs, developer tasks, text, calculators, and converters.
No Dark Patterns
No artificial processing delays, fake progress bars, or deceptive sign-up pop-ups.

Frequently Asked Questions

Everything you need to know about using TinyToolzz

What is TinyToolzz?
TinyToolzz is a browser-based suite of online utilities for images, PDFs, text, developer code, calculators, and unit converters. Every tool runs directly inside your web browser.
Are all tools on TinyToolzz free?
Yes. All tools on TinyToolzz are 100% free with no premium plans, hidden subscriptions, or daily limits.
Do I need to create an account?
No. You never need to sign up, provide an email address, or log in to use any tool on TinyToolzz.
Is my data safe? Do files get uploaded to a server?
Your files and text inputs are completely private. All processing is performed client-side using JavaScript and Web APIs. Zero file data is ever transmitted to external servers.
Do the tools work on mobile devices?
Yes! TinyToolzz is designed mobile-first and works seamlessly across iOS Safari, Android Chrome, mobile browsers, tablets, and desktop computers.

Bookmark TinyToolzz for Later

Hundreds of browser-based online tools, always accessible, fast, and completely free.

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Text Compare

Paste two texts and see every addition, deletion and similarity score instantly. Line-by-line diff with ignore-case and ignore-whitespace options.

Differences

Paste text in both boxes to see the line-by-line diff.
—
Similarity
0
Added lines
0
Removed lines
0
Unchanged lines

Technical Specifications

How the two texts are aligned and scored.

Specification Details
Input Two plain texts; comparison is line-based with Windows and Unix endings normalized
Algorithm Longest-common-subsequence alignment over lines (same family as code diff views)
Row meanings Green (+) lines exist only in B; red (−) only in A; gray lines match in both
Similarity 2 × shared lines ÷ total lines of both texts, as a percentage to 1 decimal
Ignore options Case folding and whitespace collapsing apply to matching only; display keeps originals
Size cap 3,000 lines per side; larger pastes show a clear over-limit message
Processing location 100% client-side JavaScript in your browser memory; nothing is uploaded
Usage limit None — compare unlimited texts for free, no signup required

Features

⚡

Live Diff

Rows re-align with every keystroke in either box. No compare button needed.

🎯

Similarity Score

One percentage plus added, removed and unchanged counts summarize any pair.

🔍

Noise Filters

Ignore casing or whitespace to focus the diff on real content changes.

🔒

Local Device Privacy

Everything runs in your browser with plain JavaScript. Texts never leave your device.

How to Use Text Compare

  1. Paste the original text into box A and the modified text into box B.
  2. Read the diff list: green (+) lines were added, red (−) lines were removed.
  3. Enable Ignore case or Ignore whitespace to hide noise-only differences.
  4. Uncheck Show unchanged lines to collapse the view down to changes only.
  5. Use Swap to flip sides, or Copy Diff / Download .diff to keep the result.

Reading a Diff Like a Developer

Diffs answer one question fast: what actually changed between two versions? Editors diff manuscript revisions, developers diff code, students diff essay drafts against feedback. Eyeballing two long texts misses moved lines and subtle edits; alignment plus color makes every change pop.

Additions, deletions, edits

Pure additions and deletions show as lone green or red rows. An edited line appears as a red-green pair — the old wording directly above the new one — so before and after read naturally. Unchanged context around changes proves alignment stayed honest through long matching stretches.

Similarity as a signal

The percentage compresses the whole comparison into one number: 100% means identical, 0% means nothing shared. Teachers spot paraphrase levels, editors measure revision depth, and writers track draft drift. For absolute counts behind the score, the Word Counter measures either side, and Find and Replace applies the changes you decide on.

Honest limitations

Alignment is line-based: a reworded paragraph shows as delete-plus-add rather than word-level highlighting, and reordered blocks may align surprisingly. Each side caps at 3,000 lines to keep the page instant. For very large pastes, split the comparison into sections.

Privacy and Client-Side Security

Privacy Guarantee: The entire diff runs locally inside your browser. Both texts are never transmitted, stored, or recorded on remote servers.

Many online diff tools send both of your texts to a server for processing — a poor fit for manuscripts, contracts or code. TinyToolzz takes a different approach: alignment runs in the page itself with plain JavaScript.

Because nothing is uploaded, there is no waiting, no account, and no copy retained anywhere. Your texts exist only in the tab's memory and are discarded when you close the page or click Clear.

Frequently Asked Questions

How does the text comparison work?
Both texts are split into lines and aligned with a longest-common-subsequence algorithm, the same family of techniques behind code diff views. Lines present in both stay neutral, lines only in the second text highlight green as additions, and lines only in the first highlight red as deletions.
What do the colors and symbols mean?
Green rows prefixed with + exist only in Text B and were added. Red rows prefixed with − exist only in Text A and were removed. Gray rows prefixed with a space are identical in both. An edited line appears as a red-green pair showing the old and new versions.
How is the similarity percentage calculated?
Similarity is twice the number of shared lines divided by the total lines of both texts, times one hundred. Identical texts score 100 percent and texts with nothing in common score 0 percent.
When should I use ignore case or ignore whitespace?
Enable Ignore case when capitalization differences do not matter, such as comparing drafts. Enable Ignore whitespace when indentation or trailing spaces differ, such as code pasted from different editors. Both make the diff focus on real content changes.
Is there a text length limit?
Each side accepts up to 3,000 lines so the comparison stays instant in the browser. Larger pastes show a clear message asking you to split the comparison into smaller chunks.
Is my text uploaded to a server?
No. The entire diff runs locally in your browser with JavaScript. Both texts are never transmitted, stored or logged anywhere. Closing the tab or clicking Clear removes everything immediately.

Related Text Tools

Find and Replace

Search and replace text or regex patterns instantly.
Word Counter

Count words, characters and sentences with reading-time estimates.
Sentence Counter

Count sentences with average length and a full breakdown.
Remove Duplicate Lines

Delete repeated lines while preserving original order.
Sort Lines

Sort lines alphabetically, numerically or randomly.
Character Counter

Count characters and UTF-8 bytes with platform limit checks.