6 Free PDF Tools for Common Tasks in 2026
Explore six free browser-based PDF tools for compressing, merging, converting, and creating PDFs online in 2026. No signup or desktop software needed.
ToolKnit Journal
Tips, guides & how‑tos
for every tool we ship.
Hands‑on walkthroughs, format primers and decision frameworks —each piece links straight to the free, browser‑based tool.
90
Articles
13
Categories
100%
Free
PDF Tools
07
Featured 11 min read
PDF Tools 5 min read
How to Compress a PDF to 100 KB, 500 KB or 1 MB
Learn how to set a PDF size limit, verify the output, and understand image-based compression. Practical steps, quality trade-offs, and file limits.
PDF Tools 4 min read
How to Merge Multiple PDF Files into One
Combine multiple PDF files into a single document online for free. Drag to reorder pages, merge instantly in your browser. No uploads, no sign-up required.
PDF Tools 5 min read
PDF to Image Guide: DPI, Long Images & Contact Sheets
Choose PNG, JPG or WebP, calculate PDF image resolution, and combine pages into long images or 4/9-page contact sheets with a reproducible example.
PDF Tools 6 min read
Combine Images into One PDF: Page Size, Order and Large Images
Choose Fit to Image, A4, Letter or A3, check mixed page orientations, arrange images and handle large-image warnings before saving one PDF.
PDF Tools 4 min read
How to Convert Word Documents to PDF Online
Convert DOCX to image-based PDF without Office. Check previews, fonts, layout and file-size limits; exported text is not selectable.
PDF Tools 5 min read
PDF to Word Formatting: Editable Text, Tables & Layout
Convert a text PDF to Word locally. Compare original-page and A4 modes, understand editable tables and image-preserved formulas, and check the downloaded DOCX.
Image Tools
17
Image Tools 9 min read
How to Convert Illustrator AI Files to PNG
Convert compatible AI files to PNG without Illustrator. Select artboards, pixel sizes and transparent backgrounds; follow examples and troubleshooting.
Image Tools 5 min read
How to Convert HEIC to JPG Online — Free & Private
Learn how to convert HEIC photos to JPG for free. Why iPhones use HEIC, when you need JPG, and how to batch convert without uploading to any server.
Image Tools 5 min read
Remove Image Backgrounds with AI — Free, Private, No Upload
Remove backgrounds with local AI and refine the mask. Export PNG, WebP or JPG; understand model downloads, device limits and transparency settings.
Image Tools 4 min read
Resize Images Online: Custom Dimensions & Social Media Presets
Resize images to exact dimensions or percentages. Presets for Instagram, Twitter, LinkedIn & YouTube. Free, browser-based, no server upload.
Image Tools 5 min read
How to Compress Images to 100 KB, 200 KB or 500 KB
Set a per-image size limit for JPG, PNG, or WebP. Learn about resizing, transparency, animated GIFs, batch limits, and checking your downloads.
Image Tools 4 min read
JPG to PNG: When and How to Convert
Learn when to convert JPG to PNG and how to batch convert locally. Understand why PNG cannot restore lost detail or automatically remove backgrounds.
Image Tools 4 min read
PNG to JPG: Convert Photos and Choose a Background
Convert large PNG files to compact JPG online free. Reduce file sizes while keeping great quality. Perfect for emails & web use.
Image Tools 4 min read
JPG to WebP: Boost Website Speed with Modern Images
Convert JPG to WebP locally and compare output size and quality. Learn browser support, lossy re-encoding limits and practical image-performance checks.
Image Tools 4 min read
PNG to WebP: Smaller Files with Transparency
Convert PNG to WebP for smaller files while keeping transparency. The modern replacement for PNG on the web. Free online converter.
Image Tools 3 min read
WebP to JPG: Convert for JPEG-based Workflows
Convert WebP to universally compatible JPG online free. Some apps don't support WebP yet convert in one click, no uploads.
Image Tools 6 min read
WebP to PNG: Transparency, Quality and Batch Conversion
Learn when to convert WebP to PNG, how transparency and lossless encoding work, and how to batch-convert static images without uploading your files.
Image Tools 9 min read
Seamless Carousel Sizes: Split One Image into Slides
Plan a 2, 3 or 4-slide panorama. Compare original pixels, crop and padding, then fix blurry slides, broken seams and download order with examples.
Image Tools 4 min read
How to Split Images into a 3x3 Grid for Instagram
Split any image into 9 tiles for Instagram grid posts. Download all pieces as ZIP. Free online tool, no uploads needed.
Image Tools 4 min read
How to Crop Images Online with Aspect Ratio Lock
Crop photos to 1:1, 4:3, 16:9, or custom ratios online free. Ideal for profile pictures, banners & social media. No uploads needed.
Image Tools 4 min read
Flip & Rotate Images Online — Mirror, 90°, 180°, 270°
Flip images horizontally or vertically, rotate 90, 180 or 270 degrees online free. No upload, no watermarks. Supports JPG, PNG, WebP & more.
Image Tools 5 min read
Free Online Circle Crop — Turn Any Image into a Round PNG
Crop any image into a perfect circle with transparent background. Free browser-based tool — no uploads, no signup. Export as PNG for avatars and icons.
Image Tools 7 min read
Silk Screen Filter — Tri-Color Halftone Print Effect in Your Browser
Turn photos into tri-color halftone silk screen prints. Learn to adjust dot density, screen angles, and channel colors before exporting PNG.
Video Tools
05
Video Tools 14 min read
How to Fix AI-Generated Subtitles: Timing, Overlaps, and Garbled Text
Fix AI-generated SRT and VTT subtitles with examples for timing delays, drift, overlaps and garbled Chinese text. Review before uploading.
Video Tools 5 min read
How Browser-Based Video Compression Works
Learn how browser-based video compression re-encodes video with Canvas and MediaRecorder, what affects file size, and how to make videos smaller in a browser.
Video Tools 4 min read
How to Convert Video Clips to GIF —Free, Private, No Upload
Turn video clips into animated GIFs in your browser. Mark start/end points, adjust FPS and size, then download locally. Free, no server upload.
Video Tools 5 min read
How Browser Video Audio Extraction Works
Learn browser video-to-audio extraction: PCM WAV decoding, WebM/M4A recording fallback, codec limits, performance and local file handling.
Video Tools 10 min read
How to Take a Screenshot from a Video
Capture video screenshots locally as PNG, JPEG or WebP. Mark timestamps for batch ZIP export, compare formats, and troubleshoot blurry or unsupported videos.
Audio Tools
06
Audio Tools 7 min read
Online Metronome Free — Tap Tempo, BPM, Time Signatures
Use a free online metronome with tap tempo, BPM control, time signatures, subdivisions, and precise browser audio for guitar, piano, drums, and practice.
Audio Tools 4 min read
MP3 to WAV: Export 16-bit PCM Audio Online
Convert MP3 to 16-bit PCM WAV in your browser. Learn file-size estimates, sample-rate limits and why conversion cannot restore lost MP3 detail.
Audio Tools 4 min read
WAV to MP3: Compress Audio for Sharing and Streaming
Convert WAV to compact MP3 with selectable bitrate (128-320 kbps). Perfect for podcasts & music. Free online, no uploads.
Audio Tools 6 min read
Free Online BPM Detector — Find Any Song’s Tempo from Audio
Learn how to detect BPM from MP3, WAV, or OGG audio with waveform analysis and beat markers, entirely in your browser with no file upload.
Audio Tools 10 min read
White vs. Brown vs. Pink Noise: A Practical Guide
Learn how white, brown, and pink noise differ, then compare rain, ocean, wind, and thunder to build a personal browser-based sound mix.
Audio Tools 15 min read
Free Online MIDI Keyboard —8 Synth Timbres, Quick Play Songs & .mid Export
Play piano in your browser with eight timbres, keyboard controls, sustain, recording, and MIDI export. Free online keyboard with no signup.
AI Tools
04
AI Tools 14 min read
Free AI Tarot Card Reading —Major Arcana and AI Interpretation
Explore one-card and three-card AI tarot readings for entertainment. Learn Major Arcana symbolism, provider setup, API costs and privacy boundaries.
AI Tools 12 min read
AI Ex-Partner Chat —Talk to the Memory of Someone You Lost
Learn how AI Ex-Partner Chat turns exported messages into a conversational persona, how to use it responsibly, and why the project was created.
AI Tools 10 min read
AI Text Adventure — Interactive Story Engine with Pixel Sound
Create a branching AI text adventure with 20, 50 or 100-turn settings. Learn the provider setup, RPG controls, session limits, costs and data flow.
AI Tools 8 min read
AI Life Trajectory Predictor — Multi-Round Recursive Future Inference
Learn how to explore AI-generated life scenarios, interpret narrative likelihood labels, and understand provider costs, data flows and prediction limits.
Text Tools
12
Text Tools 4 min read
Fancy Text Generator: 20+ Cool Unicode Fonts You Can Copy & Paste Anywhere
Generate fancy text with 20+ Unicode font styles — bold, italic, cursive, gothic & more. Copy and paste cool fonts on Instagram, TikTok, Twitter/X.
Text Tools 4 min read
Why Character Counts Differ: Spaces, Emoji and Chinese Text
Understand why character counts differ between apps, with tested examples for spaces, emoji, Chinese text and blank lines. Check the rules before submitting.
Text Tools 7 min read
How Many Paragraphs Is 2000 Characters? Two Counted Examples
2000 characters has no fixed paragraph count. Compare two complete English examples with verified counts, then check spaces, blank lines and your own text.
Text Tools 4 min read
QR Code Generator: Create Custom QR Codes in Seconds
Generate QR codes for URLs, text, Wi-Fi, email, phone numbers and more. Customize colors and size. Download as PNG. Free, no sign-up required.
Text Tools 4 min read
Password Generator: Create Strong Passwords Instantly
Generate strong, random passwords with customizable length, uppercase, lowercase, numbers, and symbols. One-click copy. 100% browser-based, nothing stored.
Text Tools 3 min read
Lorem Ipsum Generator: Placeholder Text for Any Project
Generate lorem ipsum placeholder text by paragraphs, sentences, or words. Copy with one click. Perfect for mockups, wireframes, and layout design. Free online.
Text Tools 5 min read
How to Extract Text from PDF & Documents Online —Free, No Install
Extract and copy text from PDF, Word, Excel, PowerPoint and 12+ formats for free. No install, no upload —runs entirely in your browser.
Text Tools 5 min read
JSON Formatter & Validator — The Developer's Quick-Fix Tool
Learn how to format, validate, and minify JSON online. Why pretty-printed JSON matters, common syntax errors, and how to debug API responses instantly.
Text Tools 6 min read
Free Invoice Generator — Create and Check a PDF Invoice
Create and download PDF invoices without sign-up. Learn about 10 currencies, the 500-item limit, Chinese text export and tax rounding.
Text Tools 5 min read
Markdown Editor — Write Markdown with Live Preview
Write Markdown with a live side-by-side preview, download a .md file and copy generated HTML. Learn supported syntax and preview safety limits.
Text Tools 4 min read
Text Diff — Compare Two Texts and Find Every Difference
Compare two text versions with line-level additions and deletions. Learn unified and side-by-side views, whitespace behavior and practical input limits.
Text Tools 8 min read
Free Online Hash Generator —MD5, SHA-256, SHA-512 & File Hash Checker
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files, create HMAC values, and verify file integrity in your browser.
Calculator Tools
06
Calculator Tools 5 min read
Unit Converter — Eight Everyday Measurement Categories
Convert units of length, weight, temperature, area, volume & more. Instant bidirectional conversion, free browser-based tool, no signup needed.
Calculator Tools 4 min read
Percentage Calculator — Calculate Percentages Instantly
Free online percentage calculator. Compute percent of a number, percentage change between values, and ratios. Instant results, no signup needed.
Calculator Tools 5 min read
Mortgage Calculator — Know Your Monthly Payment Before You Sign
Learn how to calculate mortgage payments, understand amortization schedules, and compare loan scenarios with a free online mortgage calculator.
Calculator Tools 4 min read
Tip Calculator — Never Stress About the Check Again
Learn how to calculate tips correctly, understand tipping etiquette, and split bills evenly with a free online tip calculator.
Calculator Tools 5 min read
BMI Formula and Adult Classification Standards
Learn the adult BMI formula with a 175 cm example, compare Chinese and WHO thresholds, convert jin and pounds, and understand reference weight ranges and limitations.
Calculator Tools 5 min read
Meeting Cost Calculator —Watch Your Meeting Burn Money in Real Time
Learn how a meeting cost calculator turns attendee salaries and elapsed time into a live total, helping teams understand the price of every meeting.
Time Tools
09
Time Tools 3 min read
Age Calculator: Find Out Exactly How Old You Are
Calculate age between calendar dates, check your next birthday and understand month-end and leap-day rules. Hours and minutes are day-based equivalents.
Time Tools 6 min read
Typing Test WPM: Calculation, Accuracy and Fair Comparisons
Understand correct-character WPM, Backspace, accuracy and 15-second to 5-minute typing tests. Compare English practice scores under consistent conditions.
Time Tools 4 min read
Reaction Time Test: How Fast Are Your Reflexes?
Test your reaction time with a simple click-when-green challenge. See your response time in milliseconds, track your best score, and compare against averages.
Time Tools 3 min read
Free Online Stopwatch with Lap Tracking
Learn to use the online stopwatch, record lap splits and compare intervals. Understand keyboard controls and browser timing limits. Free, no download.
Time Tools 3 min read
Free Online Countdown Timer with Audio Alert
Custom countdowns with Pomodoro, cooking & workout presets. Visual progress bar and alarm. Free online, no download needed.
Time Tools 4 min read
World Clock: Check Time in 80+ Cities Instantly
Compare time zones across the globe instantly. Search by city or country, live updating display. Free online world clock.
Time Tools 6 min read
The Pomodoro Technique — Plan Focus Sessions and Breaks
Plan focus sessions and breaks with a browser Pomodoro timer. Learn adjustable durations, session counting, alerts and background-tab limits.
Time Tools 5 min read
Unix Timestamp: Seconds vs Milliseconds and UTC Explained
Debug epoch dates with tested seconds and milliseconds examples, explicit UTC or local time, negative timestamps, DST pitfalls and JavaScript date limits.
Time Tools 6 min read
Normal Reaction Time: Around 200-250 ms for a Simple Visual Test
A simple visual reaction time is often around 200-250 ms for healthy adults. Learn what affects results and test your reflex speed online.
Creative Tools
18
Creative Tools 8 min read
Flashcard Maker Online Free — Create Study Cards with Quiz Mode
Create flashcards online for free with no signup. Learn how to make study cards, import CSV/TXT pairs, quiz yourself, and export backups locally.
Creative Tools 7 min read
Online Signature Maker Free — Draw or Type a Transparent PNG Signature
Create a signature online for free. Draw or type your signature, export a transparent PNG, and use it in documents, emails, PDFs, and forms.
Creative Tools 6 min read
Image Color Picking: Pixels, Transparency and Palettes
Learn how to sample image pixels, preserve transparency, export palettes and check text contrast. Understand screenshot, sRGB and screen-eyedropper differences.
Creative Tools 4 min read
How to Draw and Annotate with an Online Whiteboard
Create a personal drawing board, annotate an image with arrows and text, use layers, and export PNG or PDF. Learn local-save and canvas limits before you start.
Creative Tools 3 min read
What Should I Eat? Let This Random Picker Decide
Can't decide what to eat? Spin the wheel and get a random meal suggestion for breakfast, lunch, or dinner. Fun, free, and instant. No app download needed.
Creative Tools 8 min read
Questions to Ask the Universe: Examples & Ask Fate Guide
Try 12 lighthearted questions to ask the universe. Compare Oracle, Magic 8-Ball and Yes / No, understand daily answers, and manage private history and cards.
Creative Tools 8 min read
Keyboard Tester Online — Test Every Key, Check Rollover & Ghosting Free
Test every keyboard key, identify broken or stuck inputs, and check rollover or ghosting on mechanical, membrane, and laptop keyboards.
Creative Tools 8 min read
Free CPS Test Online —How to Measure and Improve Click Speed (2026 Guide)
Use a free online CPS test to measure click speed, compare 1s vs 5s scores, and improve your clicks per second with safer, more consistent technique.
Creative Tools 7 min read
Free Coin Flip & Dice Roller Online —The Only Random Decision Tools You Need
Flip a coin or roll dice online for free. Learn when to use each tool, the math behind randomness, and how ToolKnit's decision tools help you choose faster.
Creative Tools 4 min read
Free Random Spinner Wheel —Make Decisions the Fun Way
Create a custom spinner wheel with up to 15 options. Spin to make random decisions, pick winners, or settle debates. Free, no signup.
Creative Tools 7 min read
How to Convert Any Image to Pixel Art Online for Free
Turn any photo into pixel art with ToolKnit's free converter. Learn how downsampling, color quantization, and dithering create retro pixel art.
Creative Tools 6 min read
How to Use an Aim Trainer: Headshots, Tracking & Settings
Choose an aim training mode, set up sensitivity and moving targets, and understand headshot accuracy, tracking coverage and local results on desktop or mobile.
Creative Tools 5 min read
CSS Gradient Generator — Create Beautiful Gradients Visually
Create beautiful CSS gradients visually. Pick colors, adjust angle & type, copy CSS code. Free gradient generator with live preview, no signup.
Creative Tools 9 min read
Free Online Chart Maker — CSV to Bar, Line, Pie & Radar Charts
Turn CSV or spreadsheet data into bar, line, pie, radar, area, and scatter charts in your browser. Free chart maker with no signup or upload.
Creative Tools 9 min read
D6 Dice Roller Guide: 2d6 Probability, Batch Rolls and CSV
Use 1–6 six-sided dice, compare face frequency with 2d6 sums, run 10/50/100-roll experiments and export CSV. Includes the actual limits of ToolKnit Dice Roller.
Creative Tools 5 min read
"Where Did I Put It?" —Free Online Item Locator & Home Inventory
Record where you placed keys, passports, devices, or other belongings with photos and instant search. The free Item Locator stores data locally.
Creative Tools 2 min read
Free ASCII Art Generator —Convert Any Image to ASCII Text
Turn any photo into ASCII art text for free. Adjust width, charset, contrast. Download as TXT. No upload, no signup. 100% browser-based.
Creative Tools 2 min read
Free ASCII Text Banner Generator —Big ASCII Letters Online
Create big ASCII text banners from any word. 10+ FIGlet fonts. Download as TXT. Free, browser-based, no signup.
Guides
02
Guide 10 min read
Free Daily Planner Generator Online — How to Create Beautiful Printable Schedules in Minutes
Create beautiful daily, weekly & monthly planners online for free. Export printable schedules as PNG or PDF — no signup, no watermarks.
Guide 10 min read
Webcam or Microphone Not Working? Browser and Device Fixes
Fix a black webcam, silent microphone, denied browser permissions, or devices blocked by Zoom and Teams on Chrome, Safari, Windows, and macOS.
About ToolKnit
02
Guide 11 min read
2026-2027 Public Holidays & Festivals by Country
Explore 3,469 stored 2026–2027 holiday records across 129 countries and regions. Learn filters, copying, dataset dates and local-verification limits.
About 12 min read
What Is ToolKnit? 96 Free Functions, Including the Holidays Calendar
Explore ToolKnit's 96 functional pages, including its holiday hub. Learn about local file tools, connected AI and speech, privacy, and offline limits.
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