FixTools Blog
How-to guides and tips that answer your questions—then point you to free tools you can use right away.
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Practical guides for everyday file and web tasks
The FixTools blog exists to answer one question: how do I actually do this? Each guide walks you through a real-world task—merging PDFs, resizing images for social media, generating a QR code, formatting JSON, or making AI-written text sound human—step by step, without jargon. At the end of every article you will find a direct link to the free FixTools tool that does the job, no software download or account required.
Our most-read topics cover PDF tools—compressing, converting, merging, and repairing PDFs—alongside image optimisation for faster websites and better social sharing. Web developers will find guides on CSS generators, HTML builders, and JSON formatters. Writers and content teams gravitate toward our AI writing guides—humanising AI text, summarising long documents, and checking for plagiarism.
All guides are written for real people solving real problems: students submitting assignments, small-business owners handling documents, developers debugging stylesheets, and marketers resizing banner ads. If you have a task in mind but can't find a guide for it, browse the full FixTools directory—there is likely a free tool waiting for you.
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Free JSON Tools Online: The Complete FixTools Guide (2026)
Thirteen free browser-based JSON tools — format, validate, minify, and convert to and from XML, CSV, TSV, YAML, Base64, and plain text — all running on your device with no upload, no signup, and no rate limits. The complete directory and when to use each.
Free Image Tools Online: The Complete FixTools Guide (2026)
Eighteen free browser-based image tools — compress, resize, convert, crop, watermark, remove backgrounds, and more — all running on your device with no upload, no signup, and no watermarks. The complete directory and when to use each.
Free PDF Tools Online: The Complete FixTools Guide (2026)
Twenty-two free browser-based PDF tools — compress, convert, merge, split, sign, OCR, and more — all running on your device with no upload, no signup, and no watermarks. The complete directory and when to use each.
URL Encoding and Decoding Explained (With Free Online Tool)
URL encoding converts characters that are unsafe in URLs into a percent-prefixed format browsers and servers can read reliably. Learn how it works, when to use it, and how to encode or decode any URL instantly online.
How to Generate Random UUIDs (Free Online UUID Generator)
UUIDs are unique identifiers used to label records, sessions, and resources in databases and APIs. Learn what UUIDs are, how they are generated, and how to create them instantly free online.
How to Convert Units Online (Free Unit Converter)
Unit conversion is a daily task in science, cooking, engineering, and everyday life. Learn how measurement systems work, common conversion formulas, and how to convert any unit instantly online.
How to Convert XML to JSON Online (Free & Instant)
XML and JSON both represent structured data, but JSON is lighter and easier to work with in modern web applications. Learn how XML-to-JSON conversion works, what to watch for, and how to do it instantly free online.
How to Check a Website SSL Certificate (Free Online Tool)
An SSL certificate secures data between a browser and a server and tells visitors your site is legitimate. Learn how to check any site SSL certificate, what the details mean, and how to spot problems before they cause issues.
How to Create a Favicon for Your Website (Free Online Tool)
A favicon is the small icon that appears in browser tabs, bookmarks, and search results. Learn how to make one from scratch or convert an existing logo — free, no design software needed.
How to Validate an Email Address Format (Free Online Tool)
Not all email addresses that look valid actually are. Learn the rules behind valid email format, the most common mistakes, and how to test any address instantly online.
How to Convert Markdown to HTML (Free & Instant)
Markdown is easy to write, but browsers only render HTML. Learn how Markdown-to-HTML conversion works, what the output looks like, and how to handle edge cases like tables and code blocks.
How to Extract Text from Images (OCR): Free Online Tool
OCR (Optical Character Recognition) converts images, scanned documents, and photos of text into editable, searchable text. Learn how it works and how to extract text from any image for free.
How to Create a Color Palette from an Image (Free Online Tool)
Extract the exact colors from any photo, logo, or screenshot to build a matching color palette. No design software needed — do it free online in seconds.
Base64 Encode and Decode Explained (With Free Online Tool)
Base64 encoding converts binary data into ASCII text so it can be safely transmitted over text-based systems. Learn how it works, when to use it, and how to encode or decode instantly online.
How to Generate Lorem Ipsum Text (And When to Use It)
Lorem ipsum is the standard placeholder text for design mockups and prototypes. Learn what it means, why designers use it, and how to generate any amount of dummy text instantly.
Free Online SQL Formatter: Format and Beautify SQL Queries Instantly
Messy SQL is hard to debug and impossible to review. A free online SQL formatter cleans up indentation, keywords, and structure in one click. No install needed.
How to Convert CSV to JSON Online (Free & Instant)
Convert a CSV file or spreadsheet export to valid JSON in seconds. Learn the format differences, conversion rules, and how to handle edge cases like nested data and special characters.
How to Optimize Images for Website Speed (Without Blurry Results)
Images are the number one cause of slow websites. Learn how to compress, resize, and convert images to the right format so your pages load faster without sacrificing quality.
How to Make AI Text Undetectable (Without Ruining Your Writing)
AI detectors flag more content than ever, including human writing. Learn why AI text gets flagged, what actually makes text undetectable, and how to humanize AI content properly.
CSS Flexbox vs Grid: Cheat Sheet and When to Use Each
CSS Flexbox and Grid are both powerful layout systems, but they solve different problems. Learn when to use each one with a practical cheat sheet and visual examples.
How to Check if a Website is Down (For You or Everyone)
Is the site down, or is it just you? Learn how to check website uptime instantly, what causes sites to go down, and how to monitor your own site for free.
How to Remove Image Background Free Online (Instantly)
Remove any image background in seconds. No Photoshop, no design skills needed. Free browser-based background remover that works on photos, logos, and product images.
Best Free JSON Formatter and Validator Online (2026)
Format messy JSON instantly and catch syntax errors before they break your app. Free browser-based JSON formatter and validator. No signup, no install.
How to Convert PDF to Word Free Online (Without Losing Formatting)
Turn any PDF into an editable Word document for free in your browser. No software, no signup, no watermarks. Formatting preserved.
How to Generate a QR Code for Free (Any Link, Wi-Fi, or Text)
Create custom QR codes for URLs, Wi-Fi passwords, text, and more. Free, no signup, works in your browser. Download as PNG instantly.
How to Generate a Strong Password You'll Actually Remember
Create secure, random passwords instantly. Free online password generator with customizable length, symbols, and numbers. No data stored.
How to Convert Excel to PDF (and PDF to Excel) Without Losing Formatting
Convert spreadsheets to PDF and PDF tables back to Excel for free. Keep formatting, formulas, and layout intact. No software to install.
How to Convert PDF Pages to JPG Images (Free & Online)
Extract every page of a PDF as a high-quality JPG image in seconds. No software to install — works entirely in your browser.
How to Compress a PDF Without Losing Quality (Free & Online)
Reduce PDF size for email and uploads while keeping text and images sharp. No software to install—free online compressor that works in your browser.
How to Reduce Image Size for Website Speed (Without Blurry Images)
Optimize images for faster load times and better Core Web Vitals scores without visible quality loss. Free browser-based tools, no upload required.
PNG vs JPG vs WebP: Which Image Format Should You Use?
When to use each format for web, social media, and print. A practical guide to choosing the right image format, with a free converter to switch between them.
How to Format and Validate JSON for APIs (With Examples)
Make your JSON API-ready: proper formatting, syntax validation, and common pitfalls that break requests. Free JSON formatter and validator in your browser.
How to Minify HTML, CSS, and JavaScript Safely
Shrink your code for faster pages without breaking your site. What minification actually does, what to watch out for, and free tools to do it right.
How to Rewrite AI Content to Sound Human (Without Losing Meaning)
Practical steps to make AI-generated text sound natural and keep your message intact. Plus a free tool to humanize AI content instantly.
How AI Content Detectors Work (And Why They Often Get It Wrong)
What AI detectors actually look for in your text, why they produce false positives on human writing, and how to understand their real accuracy limits.
Best Way to Paraphrase Text Without Triggering AI Detectors
Learn how to paraphrase text without AI detection. Structural techniques and a free paraphrasing tool that rewrites for clarity and originality—no synonym swapping.
How to Convert ChatGPT Output Into Original Academic Writing
Turn AI-generated drafts into citation-ready academic writing without losing analytical rigor or triggering plagiarism and AI detection tools.
How to Convert PDF to Word While Keeping Formatting
Turn PDFs into editable Word documents without losing layout, tables, or fonts. Free browser-based converter — no software to install, no signup required.
How to Merge Multiple PDFs Into One File (Step-by-Step)
Combine multiple PDF files into one document in the right order, free and online. Rearrange pages, merge contracts, reports, or slides — no software needed.
Best Way to Sign PDFs Online Without Printing
Sign contracts and forms digitally without printing, scanning, or software. Free PDF signer that works entirely in your browser — no signup required.
How to Resize Images for Instagram, TikTok, and YouTube
Correct pixel dimensions and aspect ratios for Instagram, TikTok, and YouTube — all in one free online resizer. No account, no upload limits.
How to Extract All Links From a Webpage for SEO Audits
Extract every internal and external link from any webpage instantly — for SEO audits, backlink checks, and broken-link finding. Free, no install.
How to Generate Meta Tags That Actually Improve SEO
Write optimized title tags and meta descriptions that rank and get clicks. Free meta tag generator with live character count and Google SERP preview.
What Is My IP Address and What Can Websites See About Me?
Discover what your IP address reveals to websites — location, ISP, device type — and what they legally can and cannot see about you. Check yours instantly.
Unix Timestamp Explained (And How to Convert It Instantly)
What Unix epoch time is, why developers use timestamps in logging and APIs, and how to convert them to human-readable dates and back — with free tools.
How to Calculate File Size and Upload Limits
Calculate file sizes in bytes, KB, MB, and GB — and check whether your files are within upload limits for email attachments, web forms, or cloud storage.
Can You Guess These 90s Songs From One Lyric?
A fun music quiz — can you name the 90s hit from just one lyric? Test your 90s music knowledge, challenge friends, and share your score.
How Online Quizzes Increase Memory Retention (With Examples)
Why active recall through quizzes helps you retain more than re-reading — the science of spaced repetition explained, with free quiz tools for studying.