Your Data
Never Leaves
Your Device
Powerful web utilities that work on your files inside your browser. All processing happens in your browser. No uploads. No accounts. Nothing to install.
Privacy-First Architecture
Built with your security in mind. Every tool runs entirely in your browser.
Runs in Your Browser
All processing happens directly in your browser. Your files never touch our servers.
Zero Data Storage
We never store your files. They stay on your device, period.
Lightning Fast
No server round-trips means instant results. Your tools work at browser speed.
Works Offline
Once loaded, many tools work without internet, so you can work on your files with the connection switched off.
Why Your Data Shouldn't Leave Your Device
Every day, millions of people upload sensitive documents, personal photos, and private files to online tools that process them on remote servers. Most users never consider what happens to that data after the conversion or compression is complete. Server logs, temporary storage, third-party analytics, and data retention policies mean your files can persist far longer than you expect - sometimes indefinitely. A single breach at any of these services can expose passport scans, financial documents, or private images to the public internet.
ZeroDataUpload takes a fundamentally different approach. Every one of our 51 tools and converters runs entirely inside your web browser, using the browser's own capabilities for reading files, drawing graphics and cryptography. When you compress a ZIP file, convert an image, or generate a password here, the processing happens on your own CPU and memory - not on a server thousands of miles away. Your files are never transmitted over the network, never stored in a database, and never accessible to anyone but you. Once you close the tab, the data is gone.
This is not just a policy promise; it follows from how the tools are built. There is no server endpoint to receive your data, no upload mechanism to intercept, and no database to breach. Learn how client-side processing protects your privacy →
Powerful Utilities
Zero Compromise
Choose from our growing collection of privacy-focused web tools
UltraCompress Pro
Compress PNG, JPEG, WebP, AVIF and HEIF images up to 90% smaller. Batch processing, presets, built-in editor.
Epoch Converter Pro
Convert Unix timestamps and epoch time instantly. Batch processing with 418 timezones support.
Watermark Studio Pro
Add watermark to images and photos instantly. Professional watermark tool with text or logo support.
ArchivePro
Create and extract ZIP files online. Password-protected archives with AES-256 encryption support.
Favicon Generator
Create favicon.ico and all favicon formats instantly. Generate for web, iOS, and Android platforms.
UltraPass Pro
Generate strong random passwords instantly. Strong random passwords from 8 to 256 characters, no signup required.
System Intelligence
Check PC specs instantly. View your computer specs in your browser, with nothing to install.
Lorem Ipsum Generator
Free lorem ipsum generator. Instant dummy text and placeholder generator with copy paste support.
Passport Photo Maker
Create passport size photos for 70+ countries instantly. Free online passport photo maker with no uploads.
Flip the Coin
Decision making app - flip a coin to get HEADS or TAILS. Fast keyboard controls and auto flip mode.
Multi Dice Roller
Virtual dice rolling app with realistic 3D dice. Perfect for board games, RPGs, and decision making.
Picture Puzzle
Jigsaw puzzle game - rearrange scrambled pieces to recreate images. Upload your own photos to play.
UUID Generator
Professional UUID & GUID generator, RFC 9562 compliant (v1, v4, v7). Bulk generation of up to 1,000 UUIDs instantly.
Asset Tracker
Home and workshop inventory with photos, three depreciation methods, warranty alerts and a calendar. Export to a file.
Bill Generator
Bills and invoices with four templates, your logo, GST or VAT, eight currencies, saved clients and PDF download.
MINUBOT
Meeting minutes from eight templates: attendees, agenda, decisions, motions, action items with a dashboard, export to PDF, Word or Markdown.
InvoiceForge
Invoices from a form with a live preview: four templates, your logo, 17 currencies, tax presets by country, discounts, saved clients and a PDF download.
QUOTIFY
Quotations, estimates and proformas with a live preview: GST or VAT, sections and optional add-ons, a drawn signature, five themes and PDF or PNG output.
CertificateMaker
Certificates of achievement, completion, award, participation or appreciation with a live preview: five templates, six borders, your logo and signature, PDF or PNG, one or a whole CSV of names.
SocialSizer
Resize one picture or a batch for Instagram, Facebook, X, LinkedIn, YouTube, Pinterest and TikTok: 17 sizes and your own, safe-zone guides, JPG, PNG or WebP, one file or a ZIP.
BudgetSnapshot
Track income and expenses month by month: net balance, savings rate, a donut chart and category bars, budget targets with warnings, export to a file and a print view.
EmailSignature
Design a professional email signature with photo, logo, social links and a call-to-action button, preview it in Gmail, Outlook and Apple Mail, and copy it into your mail program.
BatteryPro
Watch your battery live, get a loud alert when it reaches your charge limit or runs low, count charge cycles and see your charging habits in charts.
MindSharp
Six quick brain training games for memory, patterns, mental math, words, shapes and attention, with daily sessions, streaks, skill levels and badges.
Life Discipline Tracker
Track your day across 23 life areas with 963 ready-made items and your own: a weighted daily score, streaks, XP and levels, fifteen badges, a month heatmap and weekly insights.
FERTILE
Track your cycle: periods, temperature, cervical mucus, ovulation tests and symptoms, with your fertile window and ovulation estimate on a calendar, a temperature chart, cycle statistics and a due date calculator.
StickyBoard
A kanban board with colour-coded sticky notes: boards for your projects, columns you name and reorder, notes with descriptions and due dates, drag and drop, search, an archive, and export and import as files.
PaletteSnape
Pull a colour palette out of any picture or build one from a base colour with six harmonies, get shades and gradients, check contrast and colour blindness, and export as CSS, SCSS, Tailwind, design tokens or PNG.
WORKDAYS
Count the working days between two dates, add or subtract business days, find a deadline or the latest start date, total several ranges and plan your leave, with public holidays for ten countries, your own holidays and any work week.
TextTransform
Convert text between fourteen cases from UPPERCASE to camelCase, clean up spaces, line breaks and tags, sort, shuffle, number and deduplicate lines, find and replace with regular expressions, and read live statistics and frequencies.
TextAnalyzer Pro
Count words and reading time, score readability with six formulas and a consensus grade, read the tone and the words that set it, list keywords with a word cloud, find long and passive sentences, get writing suggestions and compare two drafts side by side.
TypeMaster Pro
Test your typing speed in words per minute and train it: practice texts by difficulty, timed tests from 30 seconds to 5 minutes, lessons for every row of the keyboard, your own texts, four typing games, a keyboard that shows which finger to use, and progress charts that remember every session.
Convert Anything
In Your Browser
19 powerful file and data converters. All processing happens locally on your device.
PDF Forge
Complete PDF toolkit: merge, split, compress, convert, watermark, sign, and more.
MORPH Media Converter
Convert audio, video, and images between formats with a media engine that runs in your browser.
Encode / Decode
Encode and decode Base64, URL, HTML entity, Hex, Binary, and JWT strings.
CodeForge
Convert between JSON, XML, CSV, YAML, Markdown, Binary, Morse Code, and more.
ColorForge
Convert colors between HEX, RGB, HSL, HSV, and CMYK with picker and contrast checker.
CurrencyX
Convert currencies with live exchange rates and historical rate charts.
DocForge
Convert documents between DOCX, PDF, TXT, HTML, and spreadsheet formats.
Ebook Converter
Convert ebooks between EPUB, PDF, TXT, HTML, and FB2 formats.
MailShift
Convert email files between PST, MBOX, EML, MSG, and PDF formats.
Fancy Text Generator
Generate 99 stylish Unicode text styles for Instagram, TikTok, Twitter, and Discord.
Font Converter
Convert fonts between TTF, OTF, WOFF, and WOFF2 formats.
CipherBox
Convert text between Morse Code, Binary, Braille, NATO Phonetic, ROT13, and more.
BaseShift
Convert numbers between Binary, Octal, Decimal, and Hexadecimal bases.
OCR Converter
Extract text from images and PDFs with text recognition that runs entirely in your browser.
DataForge
Convert spreadsheets between XLSX, CSV, JSON, XML, and HTML table formats.
Text Case Converter
Transform text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
Time Zone Converter
Convert times between world time zones with meeting planner and clock dashboard.
Image Format Converter
Convert images between HEIC, WebP, AVIF, PNG, and JPG formats.
UnitSwap
Convert 200+ units across length, weight, temperature, volume, speed, and more.
Simple, Transparent
Secure by Design
Three simple steps. Zero compromises on your privacy.
-
1
Open Tool
Choose any utility from our collection. All tools load directly in your browser.
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2
Process Locally
All processing happens in your browser, so your files never reach a server.
-
3
Your Data Stays
Results remain on your device. Download, copy, or discard - you're in control.
Technical Transparency
Every tool on ZeroDataUpload runs using standard web technologies (HTML5, CSS3, JavaScript) executing entirely within your browser's sandbox. No backend servers process your data. No APIs receive your files. No databases store your information.
Why We Built ZeroDataUpload
Created by Leena Software Solutions, ZeroDataUpload provides powerful web utilities that keep your files on your device. Every tool runs entirely in your browser - your files, images, and data are never transmitted to any server.
What started as a single file compression tool has grown into a comprehensive platform of 51 browser-based applications spanning document conversion, media processing, text encoding, data formatting, and developer utilities. Each tool is built from the ground up with browser technologies and open-source libraries - no backend infrastructure, no cloud dependencies, and no hidden data pipelines. We publish detailed guides and technical articles for every tool so users understand not just how to use them, but how they work under the hood.
Our approach is simple: if a task can be done in the browser, it should be done in the browser. From PDF merging to image conversion, from AES-256 encryption to text recognition, every feature is engineered to keep your data where it belongs: on your device.
Founded by Milan Salvi in Maharashtra, India. Privacy is not a premium feature - it is a fundamental right.
Read Our Full StoryLearn, Explore, Stay Informed
In-depth guides on privacy, security, browser technology, and how our tools work under the hood
What Is Client-Side Processing and Why Does It Protect Your Privacy?
Understand the architectural difference between server-based and browser-based tools, and why it matters for your data security.
What Is AES-256 Encryption and Why Does It Matter?
How the encryption standard behind government secrets, banking systems and your ArchivePro archives works.
PDF Forge: The Complete Guide to 30 Browser-Based PDF Tools
Merge, split, compress, convert, sign, watermark, and redact PDFs - all without uploading a single page to any server.
Image Format Converter: HEIC, WebP, AVIF, PNG & JPG - All in Your Browser
A 6,900-word technical guide covering 11 input formats, codec internals, quality optimization, and the browser's image pipeline.
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Try our free browser-based tools - no uploads, no accounts, no installs
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