Free Online 1Stop Tools
The only online tools that run 100%% in your browser. We save ZERO files, ZERO data, ZERO personal info. 1,600++ free tools — clean, count, convert — all client-side, all private.
Your data never leaves your browser. All 1,600++ tools run 100% client-side — we store nothing, we upload nothing.
How It Works
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Search or browse 1,600++ free tools across 34 categories.
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Paste or type your input directly into the tool.
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Instant output — copy or download, no waiting.
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Tool of the day •Find & Replace
Extract Emails
Extract Emails — Paste any text — emails, logs, web pages — and get back a clean list of email addresses. Runs entirely client-side inside your browser.
Trending tags
All tags →Who Uses 1Stop Tools?
Students
Quick word counts, citation generators, calculators, and study helpers.
Developers
JSON formatting, encoding, regex testing, hashing, and debugging utilities.
Writers
Text cleanup, word counting, diff comparison, and readability checks.
Teachers
Quiz generators, timers, random name pickers, and classroom tools.
Content Creators
Image tools, QR codes, social media helpers, and hashtag generators.
Small Business
Calculators, converters, document tools, and productivity utilities.
Real Scenarios, Real Tools
Quick solutions for everyday problems
I need to count words in my essay
Try it →I need to convert an image to WebP
Try it →I need to generate a strong password
Try it →I need to merge multiple PDFs
Try it →I need to format messy JSON code
Try it →I need to create a QR code for my WiFi
Try it →I need to compare two text documents
Try it →I need to calculate my BMI
Try it →Why 1Stop Tools?
See how we compare to other tool sites. No accounts, no uploads, no data collection — just tools that work.
Frequently Asked Questions
Are these tools really free?
Is my data safe?
Do I need to create an account?
What file formats are supported?
Can I use these tools on mobile?
Browse by category
Clean, format, and organize your text
Convert text between different letter cases
Sort, shuffle, and reorder text lines
Find, extract, and replace text patterns
Count words, characters, and analyze text
Transform and convert text between formats
Encode, decode, and encrypt text
Generate passwords, QR codes, and more
Developer tools for coding and debugging
Online calculators and converters
Edit, convert, and optimize images
Merge, split, and manipulate PDFs
View, filter, and convert CSV data
Convert and edit office documents
Generate mobile app screenshots and assets
Edit, convert, and analyze audio files
Edit, compress, and convert videos
Convert between units of measurement
Network diagnostics and domain tools
Construction and building calculators
Electrical engineering calculators
Statistical analysis and data tools
Social media content and tools
Test REST APIs, explore GraphQL endpoints, debug WebSocket connections, and format API responses. Essential tools for API development and testing — all running client-side.
Format SQL queries, design database schemas, generate ERD diagrams, and convert between SQL dialects. Database development utilities that work entirely in your browser.
Build Docker Compose files, generate Kubernetes YAML, create GitHub Actions workflows, and write Terraform snippets. Infrastructure-as-code tools for modern DevOps workflows.
Check color contrast ratios, simulate color blindness, validate ARIA labels, and audit focus order. Essential WCAG compliance and web accessibility testing tools — all free and browser-based.
Generate Content Security Policies, security.txt files, CSRF tokens, and SRI hashes. Build cookie consent banners and privacy policies. Keep your websites secure and compliant.
Convert Markdown to HTML, PDF, and slides. Format, lint, and preview Markdown content. Generate README files and changelogs — all in your browser with instant preview.
Test, debug, visualize, and generate regular expressions. Build regex patterns visually, explain complex expressions in plain English, and batch-test against sample data — all browser-based.
Fun browser-based mini-games for kids and adults. Play memory match, dino runner, dice roller, counting caterpillar, kids piano, and more — all free, no downloads, no ads in the game area.
Count words and characters, convert case, sort lines, find and replace text, and manipulate strings. All essential text manipulation utilities — free, private, and running in your browser.
Scan QR codes and barcodes in real-time using your device camera. Digitally scan documents with edge detection and perspective correction — all processing done locally in your browser.
Solve mathematical problems, debug spreadsheet formulas, and perform calculations. Free online math utilities that work entirely in your browser — no downloads or sign-ups required.
Featured tools
- Word Counter
Free online word counter. Instantly count words, characters, sentences, paragraphs, and reading time. No upload — your text stays in your browser.
- Character Counter
Free online character counter — counts letters, digits, punctuation, whitespace, and total characters with full unicode support.
- Remove Duplicate Lines
Remove duplicate lines from text or lists. Case-insensitive and trim options. Browser-based, free, no uploads.
- Sort Lines
Sort lines alphabetically, by length, or numerically. Ascending or descending, case-insensitive, with empty-line removal.
- Case Converter
Case Converter — Switch text between UPPERCASE, lowercase, Sentence case, and tOGGLED cASE. Runs entirely client-side inside your browser.
- Find and Replace
Find and Replace — Replace any pattern in your text — exact match or regex, case-sensitive or not. Runs entirely client-side inside your browser.