Free Online Tools for PDF, Text & Code
85 fast, private tools that work right in your browser. Merge PDFs, make passport photos, calculate US and Canadian taxes, format JSON and more — no sign-up needed.
PDF Tools
Merge, compress and convert PDF files.
Organize PDF
Optimize PDF
Convert PDF
PDF to JPG
Convert every page of a PDF into a high-quality JPG image.
JPG to PDF
Convert JPG, PNG and other images into a PDF.
Scan to PDF
Use your phone camera to scan documents into a PDF.
Word to PDF
Convert Word documents (DOCX) to PDF that looks just like the original.
Excel to PDF
Convert Excel spreadsheets to neatly paginated PDF tables.
PowerPoint to PDF
Convert PowerPoint presentations (PPTX) to PDF, one slide per page.
PDF to Word
Convert PDF text into an editable Word (DOCX) document.
PDF to Excel
Pull tables and data from a PDF into an Excel spreadsheet.
PDF to Markdown
Turn PDFs into clean Markdown — great for notes, docs and LLMs.
Edit PDF
Edit PDF
Add text, images, shapes and highlights to a PDF.
Watermark PDF
Stamp text or an image over your PDF pages.
Add Page Numbers
Add page numbers to a PDF with your choice of position and style.
Crop PDF
Trim the margins of PDF pages.
Sign PDF
Draw, type or upload your signature and place it on a PDF.
Fill PDF Forms
Fill in fillable PDF forms and optionally flatten them.
PDF Security
PDF Intelligence
Marketing & Business Tools
Campaign links, ad metrics, email signatures, scheduling and timesheets.
Email Signature Generator
Design a professional email signature for Gmail, Outlook and Apple Mail and copy it in one click.
UTM Campaign URL Builder
Build UTM-tagged campaign links one at a time or in bulk from a CSV, with saved presets.
Ad Metrics Calculator
Calculate ROAS, CPA, CPM, CTR, CPC and conversion rate from whatever numbers you have.
Time Zone Meeting Planner
Find a meeting time that works across cities, with working hours and overlap highlighted.
Timesheet Calculator
Add up weekly work hours with breaks, overtime after 40 hours and pay — print or save as PDF.
Google SERP Snippet Preview
Preview your page in Google results on desktop and mobile, with pixel-based truncation.
Social Share Preview
Preview how a link will look when shared on Facebook, LinkedIn and X.
Social Media Image Resizer
Resize one image for Instagram, Facebook, LinkedIn, YouTube and Pinterest at once.
Social Media Character Counter
Check a post against X, LinkedIn, Threads, Instagram, YouTube and Pinterest limits at once.
Software Development Cost Calculator
Get a rough cost and timeline range for a software project from features, team and rates.
Meeting Cost Calculator
See what a meeting really costs, with a live running-cost timer and yearly totals.
Freelance Hourly Rate Calculator
Work out the hourly and day rate you need from your income goal, expenses, taxes and time off.
AI & ML Tools
Count tokens, compare LLM API costs and size GPUs for models.
LLM Token Counter
Count tokens for OpenAI models exactly, estimate Claude and Gemini tokens, and see the cost.
LLM API Cost Calculator
Compare monthly API costs for GPT, Claude, Gemini and DeepSeek models side by side.
GPU VRAM Calculator for LLMs
Estimate the GPU memory needed to run or fine-tune an LLM, and which GPUs fit.
CSV to JSONL Converter (Fine-Tuning)
Turn a spreadsheet into JSONL training data in chat-message format for fine-tuning.
Precision, Recall & F1 Calculator
Calculate precision, recall, F1, accuracy, MCC and more from a confusion matrix.
Design Tools
Colors, palettes, sizes and print-ready assets.
Color Palette from Image
Extract 3–10 dominant colors from any image and export them as CSS variables.
Color Converter
Convert colors between HEX, RGB, HSL, HSV and CMYK, with shades and opacity.
SVG Optimizer
Shrink SVG files with SVGO — see before and after size and a live preview.
Print Size & DPI Calculator
Find the maximum print size for an image, the pixels a print needs, or an image's effective DPI.
Aspect Ratio Calculator
Find the aspect ratio of any size and resize dimensions without distortion.
Color Contrast Checker
Check text and background colors against WCAG AA and AAA, with suggested fixes.
Immigration & Passport Tools
Passport photos and document prep for Canada and US applications.
IRCC PDF Compressor
Shrink PDFs under 1, 2 or 4 MB for Canada immigration (IRCC) portal uploads.
Canada Passport & PR Photo Resizer
Crop a photo to 50×70 mm with face guides and export a 600 DPI JPG or PR digital photo.
US Passport & DV Lottery Photo Tool
Make a 2×2 inch US passport photo or a 600×600 px DV Lottery photo under 240 kB.
US & Canada Tax Calculators
Sales tax, self-employment tax, land transfer tax and more.
Free Invoice Generator (USD/CAD)
Create a professional invoice with US sales tax or Canadian GST/HST/PST and download a PDF.
Canada Sales Tax Calculator
Add or remove GST, HST and PST for any province, with a full tax breakdown.
1099 Quarterly Estimated Tax Calculator
Estimate quarterly taxes for freelancers: SE tax, federal income tax and due dates.
Self-Employment Tax Calculator
Break self-employment tax into Social Security and Medicare, with the deductible half.
Land Transfer Tax Calculator
Estimate land transfer tax for Ontario, Toronto, BC, Quebec and more, with first-time buyer rebates.
TFSA vs RRSP Calculator
Compare the after-tax value of saving in a TFSA or an RRSP, with a year-by-year chart.
California Overtime Calculator
Calculate daily, weekly and seventh-day overtime and double time under California law.
Image & Video
Convert videos, fix subtitles, and calculate timecodes and bitrates.
Video to MP4
Convert MOV, MKV, AVI, WebM, WMV and other videos to MP4.
Favicon Generator
Create a favicon.ico and all website icons from text, emoji or an image.
Subtitle Converter (SRT ↔ VTT)
Convert subtitles between SRT and WebVTT for YouTube, video players and the web.
Subtitle Time Shifter
Fix out-of-sync subtitles: shift every cue or sync using two reference points.
Timecode & Frame Rate Calculator
Convert timecode to frames, add or subtract timecodes, including 29.97 drop-frame.
Video Bitrate & File Size Calculator
Estimate video file size from bitrate, or the bitrate needed to hit a target size.
Text Tools
Count, clean up and transform text.
Summarizer
Get the key points of an article, essay or PDF in seconds.
Word Counter
Count words, characters, sentences, paragraphs and reading time.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case and more.
Markdown Editor with Live Preview
Write Markdown with a live, sanitized preview and export it as .md or .html.
Developer Tools
Format, validate and encode data.
JSON Formatter
Format, beautify, minify and validate JSON with syntax highlighting.
Base64 Encoder/Decoder
Encode and decode text or files to and from Base64.
PX to REM Converter
Convert px to rem (and back) with any base size, plus bulk CSS conversion.
CSS Clamp() Generator
Generate fluid typography and spacing with CSS clamp() that scales between two screen sizes.
CSS Gradient & Box Shadow Generator
Design gradients and layered box shadows visually and copy the CSS or Tailwind class.
Tailwind Color Shades Generator
Turn one brand color into a full 50–950 Tailwind palette and export the config.
Meta Tags & Open Graph Generator
Generate SEO meta tags, Open Graph and X/Twitter card tags, or a Next.js metadata object.
Schema Markup Generator
Create JSON-LD structured data for FAQ, Local Business, Article and Product pages.
JSON to TypeScript Converter
Generate TypeScript interfaces or types from sample JSON, with nested and optional fields.
cURL to Fetch / Axios Converter
Turn curl commands into JavaScript fetch() or Axios code, with headers, body and auth.
Cron Expression Generator & Explainer
Build and explain cron expressions in plain English and see the next 5 run times.
JWT Decoder
Decode a JSON Web Token's header and payload and check when it expires — privately.
Subnet / CIDR Calculator
Calculate IPv4 network, broadcast, host range and masks, and split a network into subnets.
Diff Checker
Compare two texts or code snippets side by side or inline, with word-level highlights.
Calculators
Quick answers for money and math.
Why use BigTool?
Private by design
Files are processed in your browser and never uploaded to a server.
Fast
No waiting in upload queues — results appear instantly on your device.
100% free
No sign-up, no watermarks and no daily limits.