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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

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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

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Remove Duplicate Lines

Delete repeated lines from any list instantly. Original order is preserved, matching is case-sensitive by default, and blank-line handling is fully adjustable.

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Original lines
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Unique lines
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Duplicates removed
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Reduction

Technical Specifications

Exactly how duplicates are detected and removed.

Specification Details
Input Plain text with one item per line; Windows and Unix line endings both accepted
Dedup rule First occurrence of each distinct line is kept; later repeats are dropped; order never changes
Case-sensitive (default on) Apple and apple are different lines; turn off to treat them as the same, keeping the first form
Skip blank lines (default off) When on, every empty line is dropped; when off, the first blank line is kept like any line
Trim before comparing (default off) When on, leading and trailing spaces are ignored for matching only; kept lines print unchanged
Processing location 100% client-side JavaScript in your browser memory; nothing is uploaded
Usage limit None — clean unlimited lists for free, no signup required

Features

⚡

Live Cleaning

Duplicates vanish as you type or paste. Toggle any option and the output rebuilds instantly.

📋

Order Preserved

Unlike sort-based cleaners, the first occurrence stays exactly where it was. No reordering, ever.

🔍

Smart Matching

Case sensitivity, blank-line skipping and whitespace trimming adapt matching to messy real-world lists.

🔒

Local Device Privacy

Everything runs in your browser with plain JavaScript. Email lists and data never leave your device.

How to Use Remove Duplicate Lines

  1. Paste your list into the input box, one item per line.
  2. Duplicates are removed live; watch the removed count in the stats.
  3. Turn case-sensitive matching off if Apple and apple should count as one.
  4. Enable Skip blank lines to drop empty lines, or Trim before comparing for padded data.
  5. Click Copy Output or Download .txt to keep the cleaned list.
  6. Click Clear to empty both boxes and start over.

Why Duplicate Lines Pile Up

Merged mailing lists, scraped URLs, keyword exports and log files all arrive with repeats. Sending the same email twice annoys subscribers, double-counted keywords skew SEO analysis, and duplicated IDs break imports. Cleaning by hand is slow and unreliable past a few dozen lines — a single missed repeat can undo the whole job.

Order matters

Spreadsheet “remove duplicates” features often sort first, destroying priority order, timestamps or ranking. This tool keeps the first occurrence exactly in place and drops only later repeats, so a ranked keyword list stays ranked. When order truly does not matter and you want alphabetical output instead, run the result through the Sort Lines tool next.

Case, blanks and padding

Real-world lists are messy: the same email in different cases, blank rows from spreadsheet exports, and padded values from fixed-width files. Case-insensitive mode unifies casing variants while keeping the original spelling of the first sighting; blank skipping and trimming handle the other two without altering kept lines. For broader whitespace cleanup, see Remove Extra Spaces and Remove Empty Lines.

Honest limitations

Comparison is line-based, so near-duplicates with different wording (“John Smith” vs “Smith, John”) are not detected. The tool cannot merge or fuzzy-match entries. For very large pastes of tens of megabytes, live cleaning on each keystroke can feel slower on older phones.

Privacy and Client-Side Security

Privacy Guarantee: All cleaning occurs locally inside your browser. Your text is never transmitted, stored, or recorded on remote servers.

Many online cleaners send your pasted lists to a server for processing — a poor fit for email addresses, customer data or keyword strategies. TinyToolzz takes a different approach: every comparison runs in the page itself with plain JavaScript.

Because nothing is uploaded, there is no waiting, no account, and no copy of your data retained anywhere. Your text exists only in the tab's memory and is discarded when you close the page or click Clear.

Frequently Asked Questions

How does duplicate line removal work?
The tool reads your text line by line and keeps only the first occurrence of each distinct line. Original order is always preserved — nothing is sorted — so the output is your list with repeats stripped out.
What is the difference between case-sensitive and case-insensitive matching?
With case-sensitive matching (the default), Apple and apple count as different lines and both are kept. With case-insensitive matching, they count as the same line and only the first occurrence is kept, in its original capitalization.
What happens to blank lines?
By default, blank lines are treated like any other line: the first blank line is kept and further blank lines count as duplicates. Enable Skip blank lines to drop every empty line from the output instead.
Does trimming whitespace change my lines?
No. Trim before comparing only affects how lines are matched: ' apple ' and 'apple' then count as duplicates. The kept line is always written out exactly as it first appeared, spaces included.
Is there a text length limit?
There is no fixed limit. The tool handles lists of hundreds of thousands of lines in memory. Extremely large pastes (tens of megabytes) may respond more slowly because cleaning runs on each keystroke.
Is my text uploaded to a server?
No. All cleaning happens locally in your browser with JavaScript. Your text is never transmitted, stored or logged anywhere. Closing the tab or clicking Clear removes it from memory immediately.

Related Text Tools

Remove Empty Lines

Delete blank lines and tidy whitespace in any text.
Sort Lines

Sort lines alphabetically, numerically or randomly.
Reverse Lines

Flip the order of lines in any list or text.
Remove Extra Spaces

Trim leading, trailing and repeated spaces from any text.
Find and Replace

Search and replace text or regex patterns instantly.
Word Counter

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