Worked example · 5 min read
Convert JSON and YAML without silently rounding numbers
Convert JSON and YAML with large integers, precise decimals and string IDs. Check the expected output and learn what downstream parsers may change.
Free Online Tools for Code, PDFs & Images
Explore 30 free browser tools for developers, PDFs, images, testing and everyday calculations. Format SQL, convert data, edit a portrait or combine documents — no account or installation.
Search by tool name, category or keyword — matching tools appear right below, or press Enter to see full results, even for a misspelled name.
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Choose the right tool for the job
Developer Tools
Free local tools for JSON, YAML, CSV, SQL, Markdown and cron. Compare formats, try worked examples and learn the limits before converting your data.
Compare tools and examples →Image Tools
Compress JPG, PNG and WebP, remove or change a portrait background, blur it, and crop passport-size photos. Local browser editing with clear limits.
Compare tools and examples →PDF Tools
Merge PDFs in a chosen order or split a PDF into page groups. Files are processed locally in your browser, with no upload or account required.
Compare tools and examples →Testing
Test internet speed, keyboard input and browser-reported display performance. Compare what each test measures, its privacy limits and common sources of error.
Compare tools and examples →Calculators
Choose a scientific, graphing, age or mortgage calculator. Check units, angle mode and assumptions, then inspect a worked example before using a result.
Compare tools and examples →Productivity
Combine a local to-do list with a Pomodoro or countdown timer. Set priorities, export task backups and understand browser storage and notification limits.
Compare tools and examples →Featured tools
Start with these everyday utilities
Keyboard Tester
Test your keyboard keys online and instantly spot stuck or unresponsive keys.
JSON Formatter
Format, validate and beautify JSON data online, right in your browser.
Portrait Background Remover
Remove a person’s background locally and download a transparent PNG portrait.
Passport Photo Maker
Crop a photo to common ID dimensions with guides and downloadable photo output.
Merge PDF
Combine PDFs in your chosen order and download one document without uploading files.
SQL Formatter
Format SQL queries for common dialects with readable indentation, locally.
JSON ↔ YAML Converter
Convert JSON and YAML locally with explicit validation and precision checks.
CSV ↔ JSON Converter
Convert CSV tables and JSON arrays locally with delimiter and quoting controls.
All tools
30 tools
Keyboard Tester
Test your keyboard keys online and instantly spot stuck or unresponsive keys.
Password Generator
Generate strong, secure, random passwords for free, right in your browser.
Internet Speed Test
Check your download, upload, ping and jitter in about 20 seconds, free and online.
Unit Converter
Convert length, weight, temperature, volume and more between units instantly.
Image Compressor
Reduce JPG, PNG and WebP file size with adjustable quality, right in your browser.
Scientific Calculator
Scientific calculator with trigonometry, logarithms, roots, powers and memory, right in your browser.
Graphing Calculator
Plot multiple functions, zoom, pan, trace values and download the graph as a PNG image.
Mortgage Calculator
Estimate monthly mortgage payments, payoff date and total interest, with extra payments and an amortization schedule.
Age Calculator
Calculate your exact age, days between two dates, or add and subtract time from a date.
JSON Formatter
Format, validate and beautify JSON data online, right in your browser.
Pomodoro Timer
Stay focused with a free Pomodoro timer for work sessions and short breaks.
To-Do List
Organize your tasks with a simple, free to-do list that works right in your browser.
BMR Calculator
Estimate your basal metabolic rate and daily calorie needs by activity level and weight goal.
QR Code Generator
Create QR codes for links, Wi-Fi, text and contacts, with local PNG and SVG downloads.
Display & Frame Rate Tester
See reported screen dimensions and measure browser animation FPS and frame pacing.
Portrait Background Remover
Remove a person’s background locally and download a transparent PNG portrait.
Portrait Background Changer
Replace a portrait background with a solid color or your own local image.
Portrait Blur
Keep a person in focus while softening the portrait background in your browser.
Passport Photo Maker
Crop a photo to common ID dimensions with guides and downloadable photo output.
Merge PDF
Combine PDFs in your chosen order and download one document without uploading files.
Split PDF
Extract selected PDF pages or split ranges into separate local PDF downloads.
YAML Validator
Validate YAML locally and identify syntax, duplicate-key and structure errors.
SQL Formatter
Format SQL queries for common dialects with readable indentation, locally.
Markdown Preview
Preview GitHub-flavored Markdown locally with sanitized output and HTML export.
Base64 Encoder / Decoder
Encode UTF-8 text or decode standard and URL-safe Base64, with binary downloads.
JSON ↔ YAML Converter
Convert JSON and YAML locally with explicit validation and precision checks.
CSV ↔ JSON Converter
Convert CSV tables and JSON arrays locally with delimiter and quoting controls.
Color Converter
Convert HEX, RGB and HSL colors, preserve alpha and preview text contrast.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 checksums for text or a local file.
Cron Expression Builder
Build a five-field cron expression and preview upcoming times in a chosen time zone.
No tools match your search. Try a different keyword.
Worked examples you can check
All guides →Worked example · 5 min read
Convert CSV to JSON while keeping leading zeros and line breaks
Convert a realistic CSV example with a 00123 identifier, quoted commas, escaped quotes and a multiline field. Check the expected JSON and a safe return to CSV.
Worked example · 6 min read
Check cron schedules across time zones and daylight saving
Preview five-field cron with America/Toronto examples. See the difference between local time and UTC, skipped spring times and repeated autumn times.
Worked example · 5 min read
Merge PDFs in the right order and check the result
Merge PDFs in a chosen order, verify the downloaded pages and extract a range. Follow a local processing example and understand document limitations.
Worked example · 5 min read
Decode Base64 without confusing text and binary bytes
Test Unicode, URL-safe Base64, padding and binary output with reproducible examples. Understand which bytes survive copying, editing and downloading.
Worked example · 5 min read
Format SQL for the right dialect and review the result
A PostgreSQL formatting example, dialect selection tips and a practical review checklist. See why readable SQL does not prove validity or performance.
Worked example · 5 min read
Preview Markdown and understand the cleaned HTML export
Compare Markdown source, sanitized HTML and a standalone download. Test tables, links, code and omitted images without embedded image requests.
Worked example · 5 min read
Convert CSS colors without losing alpha or misreading contrast
Convert a transparent HEX color to RGB and HSL, check text on its real background, and compare near-threshold contrast values with worked examples.
Worked example · 5 min read
Compress images without a visible loss of quality
Reduce JPG, PNG and WebP file size by choosing the right format, quality and width. A worked example and a checklist for judging the result before you save.
Worked example · 6 min read
Read your internet speed test results: Mbps, ping and jitter
Understand download, upload, ping, jitter and ping under load, convert Mbps to MB/s, and run a fairer test before you contact your provider.
Worked example · 5 min read
Base64 is not encryption: what it does and when to use it
Encode and decode Base64 with checkable examples, learn standard versus URL-safe alphabets and padding, and avoid treating encoded secrets as protected.
Worked example · 4 min read
Use a task list and timer without losing your work
Plan a small task, run a timed focus session and export a local task backup. Check browser storage and notification limits before relying on the workflow.
Worked example · 4 min read
Check an expression and graph before trusting a result
Verify calculator angle mode, parentheses and graph range with small reproducible examples. Learn why a numerical output or plotted line still needs context.
Free online tools
Your Tech Tool is maintained in Montréal, Québec, Canada and provides free, browser-based tools designed to help with everyday tasks — from testing your keyboard to generating a secure password, checking your internet speed or converting between units of measurement. Every tool is built to be fast, straightforward and usable on any device with a modern web browser.
The developer, image and PDF collections include practical examples, format limits and links to the tools you need. There's nothing to install and no account required — just open a tool and start using it.
Why use browser-based tools?
Browser-based tools run directly in your web browser, so there's no software to download, install or keep updated. They work in modern desktop and mobile browsers. Available features and memory limits depend on your browser and device; each tool explains its requirements.
Because there's no installation step, you can jump straight to the tool you need — helpful whether you're at your own computer, a work machine, or borrowing someone else's.
Tools for everyday tasks
Not every task needs a full application. Checking if a keyboard key works, generating one strong password, or converting kilometers to miles are quick jobs that a lightweight web tool can handle in seconds. Your Tech Tool focuses on these everyday utilities. Read how we test to understand the checks and their limits.
As the collection grows, tools are grouped into clear categories — like Testing, Security and Converters — so you can find what you need without digging through menus.
Frequently asked questions
What is YourTechTool?
YourTechTool is a free collection of browser-based online tools and utilities, covering things like testing, security, conversions and more. New tools are added regularly.
Are the tools free?
Yes. Every tool on YourTechTool is completely free to use, with no hidden fees, trials or subscriptions.
Do I need to create an account?
No. There is no login, registration or account system. You can open any tool and start using it immediately.
Do I need to download software?
No downloads or installations are required. Every tool runs directly in your web browser.
Can I use the tools on my phone?
Yes. Every tool is designed to work on desktop, tablet and mobile browsers.
Are my files or data uploaded to a server?
It depends on the tool. Many tools, such as the password generator and unit converter, run entirely in your browser and never send your input anywhere. Some tools may need to contact a server to function (for example, an internet speed test). Each tool page describes exactly how it handles your data.