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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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PDF Tools
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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

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

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CSV to JSON

Turn spreadsheet CSV into clean JSON arrays. Delimiters auto-detect, quotes parse correctly, numbers type themselves. All parsing stays in your browser.

Input CSV 0 chars
Ready. Paste CSV and click Convert to JSON.
No data 0 rows 0 columns 0 B
JSON output (array of objects) 0 chars

Technical Specifications

Parsing rules used for every conversion.

SpecificationDetails
Accepted inputCSV text with consistent cell counts; first row used as keys unless disabled
DelimitersAuto-detect across comma, semicolon, tab, pipe; manual lock available
QuotingRFC 4180 state machine: quoted cells hold delimiters, doubled quotes, and line breaks
Type detectionNumbers, true/false, and null typed automatically; leading-zero codes stay strings; empty cells stay empty
HeadersTrimmed and deduplicated (city, city_2); without headers keys become col1, col2, …
Ragged rowsRejected with the exact row number so the sheet can be fixed at the source
OutputJSON array of objects with 2-space, 4-space, tab, or minified indentation
Processing location100% client-side JavaScript in your browser memory; nothing is uploaded
ExportCopy JSON text to clipboard or download a .json file
Usage limitNone — convert unlimited sheets for free, no signup required

Features

🧭

Delimiter Auto-Detect

Comma, semicolon, tab, or pipe recognized from the first rows — paste European exports without configuring anything.

💬

Quote-Aware Parser

Cells with commas, embedded quotes, or multi-line addresses survive intact instead of splitting rows apart.

🔢

Smart Typing

Quantities arrive as numbers and flags as booleans, while ZIP codes with leading zeros stay strings.

🔒

Local Device Privacy

Parsing runs in page memory only. Spreadsheet data never leaves your device.

How to Convert CSV to JSON

  1. Paste CSV text into the Input CSV box, or click Load Sample.
  2. Leave Auto-detect on unless you know the file uses an unusual separator, and keep the header checkbox set for labeled keys.
  3. Pick the JSON indent style and click Convert to JSON. Ragged rows report their exact row number.
  4. Review the array, then Copy JSON into code or Download .json for configs and API mocks.
  5. To go the other direction later, feed the result into JSON to CSV.

From Spreadsheets to App Data

Product catalogs, translation tables, and seed data usually start life in a spreadsheet and end life inside an app. The converter bridges the two: each row becomes an object keyed by the header, quoted addresses with commas stay whole, and numeric columns arrive typed so sorting and math work without cleanup.

Why auto-detect matters

A semicolon file pasted as comma-separated produces one giant key and zero usable rows — the most common CSV import failure. Detection reads the first rows and locks the right separator before parsing starts. To inspect the resulting structure visually, open it in the JSON Viewer; to flatten it back to a sheet, use JSON to CSV.

Honest limitations

Every data row must match the header cell count — ragged rows are rejected, not guessed. Nested JSON inside cells stays as text rather than expanding into objects. An unterminated quote fails with its row so the break can be found fast.

Privacy and Client-Side Security

Privacy Guarantee: All parsing and conversion occur locally inside your browser. Your CSV text is never transmitted, stored, or recorded on remote servers.

Many online converters upload your sheets to a server for processing. TinyToolzz keeps everything in-page with plain JavaScript.

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

Frequently Asked Questions

How does the converter read my CSV?
The first row becomes the object keys and every following row becomes one object. Quoted cells may contain delimiters, quotes, or line breaks without breaking the table.
Do I need to pick the delimiter myself?
Usually not. Auto-detect scans the first rows and picks comma, semicolon, tab, or pipe automatically. You can still lock a delimiter manually for unusual files.
Are numbers kept as numbers in the JSON?
Yes, when type detection is on. Numeric cells become JSON numbers, true and false become booleans, and empty cells become empty strings. Codes with leading zeros stay as strings.
What happens with ragged rows or duplicate headers?
A row with more or fewer cells than the header stops conversion with an error naming the exact row. Duplicate headers are renamed automatically, for example city and city_2.
Can I convert a CSV without a header row?
Yes. Uncheck First row is header and columns become col1, col2, and so on in order. Every row is still validated for a consistent cell count.
Is my CSV data sent to a server?
No. All parsing and conversion runs locally in your browser with JavaScript. Nothing is transmitted, stored, or logged anywhere. Closing the tab or clicking Clear removes it from memory.

Related JSON Tools

JSON to CSV

Convert arrays of JSON objects into downloadable CSV files.
JSON Viewer

Visualize any JSON payload as an expandable collapsible tree.
JSON Compare

Compare two JSON objects side by side with visual diff highlights.
JSON Tree Viewer

Explore deeply nested JSON as a clean guided tree diagram.
JSON Escape

Escape quotes and special characters for string embedding.
JSON Validator

Validate JSON syntax and debug errors instantly.