Free tools, built for useful daily work

Thousands of practical web tools, starting with the ones people search for every day.

Amanta AI is creating a growing library of free online utilities for documents, images, code, QR codes, and web workflows.

Explore tools Request a build

85free tools available now

QR Code Generator QR Code Scanner QR Code for a Website Link JSON Formatter

Focused starter tools

Built around specific search intent.

Each early tool page targets a clear task, so visitors can land directly on the workflow they need.

QR Code Generator

Create QR codes for links, Wi-Fi, contacts and more, with PNG and SVG downloads.

QR Code Scanner

Read QR codes from your camera, a photo or a screenshot.

QR Code for a Website Link

Turn a URL into a QR code, with optional UTM tags to track scans.

JSON Formatter

Beautify, validate, repair and minify JSON, with a tree view and clear error messages.

JSON Formatter for API Responses

Pretty print API responses, strip HTTP headers and JSONP, and copy paths to nested values.

JPG to PNG Converter

Convert JPG images to PNG, one at a time or in a batch, with a ZIP download.

See all tools

Browse tools by category

QR code tools

QR Code Generator

Create QR codes for links, Wi-Fi, contacts and more, with PNG and SVG downloads.

QR Code Scanner

Read QR codes from your camera, a photo or a screenshot.

QR Code for a Website Link

Turn a URL into a QR code, with optional UTM tags to track scans.

Developer tools

JSON Formatter

Beautify, validate, repair and minify JSON, with a tree view and clear error messages.

JSON Formatter for API Responses

Pretty print API responses, strip HTTP headers and JSONP, and copy paths to nested values.

Cron Expression Explainer and Generator

See what a cron expression means in plain words, with the next run times, and build crontab schedules.

JWT decoder

Decode JWT header and payload, check expiry and verify the signature locally.

YAML Validator

Check YAML for errors with the exact line and convert it to JSON or tidy YAML.

XML Validator

Check XML for errors with the exact line, validate against XSD, and format, minify or convert it.

HTML Viewer

Preview HTML, CSS and JavaScript live, check for errors and test phone widths.

Schema Markup Validator

Test JSON-LD and microdata against Google rich result rules, with templates.

Base64 Decode and Encode

Decode Base64 to text, images or files and encode text or files to Base64.

SQL Formatter

Format and minify SQL for MySQL, PostgreSQL, SQL Server and more, with error checks.

Image tools

JPG to PNG Converter

Convert JPG images to PNG, one at a time or in a batch, with a ZIP download.

JPG to WebP Converter

Convert JPG and PNG to WebP with quality and resize controls, in batches.

Compress JPG to 100KB

Shrink a JPG photo below 100 KB for exam, job and ID upload forms.

PNG to SVG Converter

Convert PNG or JPG to SVG, SVG to PNG or JPG at any size, and generate favicon.ico and app icons.

HEIC to JPG Converter

Convert iPhone HEIC photos to JPG, PNG or WebP in a batch, without uploading them.

WebP to JPG Converter

Convert WebP images to JPG or PNG in a batch, with quality control and no upload.

Aspect Ratio Calculator

Find the ratio of any size and resize it without stretching, with 16:9, 4:3 and social presets.

Image Compressor

Compress JPG, PNG and WebP by quality or to an exact size in KB, with a before/after view.

Image Resizer

Resize photos in pixels, percent or inches, with passport and social media presets.

Image Cropper

Crop photos with ratios, social media and passport presets, circle crop and rotation.

Math calculators

Scientific Calculator

Trig, logs, powers, roots and factorials with a live result, DEG/RAD and history.

Volume Calculator

Volume of 12 shapes, liquid in a partly full tank, and CBM of boxes, in every unit.

Health and fitness calculators

BMI Calculator

Body mass index with category, healthy weight range and waist-to-height ratio, in metric or US units.

Finance calculators

Mortgage Calculator

Monthly payment, total interest and amortization schedule, with extra payments, taxes, insurance and PMI.

Compound Interest Calculator

Future value of savings with monthly contributions, compounding, inflation, tax and a savings goal.

VAT Calculator

Add or remove VAT, GST or sales tax with current rates for 60+ countries, Canada and India.

Budget Calculator

Monthly budget with the 50/30/20 rule, net worth, savings goal and emergency fund calculators in any currency.

Loan payment calculator

Work out a loan's payment, total interest, payoff date and full schedule.

Color tools

Color Picker and Contrast Checker

Pick colors from the screen or an image, convert HEX, RGB and HSL, and check WCAG contrast.

Barcode tools

Barcode Generator and Check Digit Validator

Make UPC, EAN-13, Code 128 and ITF-14 barcodes with check digit validation, PNG, SVG and bulk ZIP.

Date and time tools

Work Hours Calculator

Weekly timesheet with breaks, night shifts, decimal hours, overtime and pay.

Electrical calculators

Wire Gauge Calculator

Wire size in AWG or mm² from amps, distance and voltage drop, for DC, single-phase and three-phase.

Electrical Load Calculator

Total watts, peak amps, breaker, service and generator size from your appliances.

Career and pay tools

Paycheck Calculator

Take-home pay per hour, week, two weeks, month and year from your pay and your own deduction rates.

Measurement converters

Measurement Converter

Length, weight, temperature, volume and cooking conversions, plus shoe and ring size charts.

Inches to cm converter

Convert inches to centimeters and back, with fractions, feet and inches and a ruler.

Pressure Converter

Convert psi, bar, kPa, atm, mmHg and 15 more units, plus depth and altitude.

Distance Calculator

Miles between cities: straight line, driving distance and time, with a map.

Automotive calculators

Tire Size Calculator

Compare two tire sizes, see the speedometer error, and work out a trip's fuel cost.

Fuel Cost Calculator

Trip and commute fuel cost from distance, mpg and gas price, split by passengers.

Construction and DIY calculators

Concrete Calculator

Concrete for slabs, footings, columns and steps, with bags, mix and cost, plus tile and paint estimates.

Mechanical Engineering Calculator

Gear ratio, torque and horsepower, bolt torque, belt length and cylinder force.

Marketing tools

CPM Calculator

CPM, CPC, CTR, conversion rate, CPA, ROAS and ROI for any ad campaign, plus a budget planner.

UTM builder

Add UTM tracking parameters to links and see the GA4 channel they land in.

Network tools

What Is My IP Address?

Your public IPv4 and IPv6 address, location and ISP, plus IP lookup and a subnet and CIDR calculator.

DNS Propagation Checker

Check DNS propagation across major public resolvers, look up all records, and test SPF, DMARC, DKIM and reverse DNS.

Internet speed test

Measure download and upload speed, ping and jitter, and see what your connection can handle.

SSL checker

Check an SSL certificate's validity, expiry date, chain and TLS versions.

Website Checker

Is a site up? Status code, redirects, speed, SSL, SEO tags, security headers and DNS.

PDF tools

Compress PDF to 500KB

Make a PDF smaller for 500 KB upload limits on forms, portals and email.

Image to PDF Converter

Combine JPG, PNG and other images into one PDF, with page order, rotation, A4 or Letter and margins.

PDF to JPG Converter

Convert PDF pages to JPG, PNG or WebP at up to 300 dpi, with page selection and ZIP download.

PDF converter

Convert PDF to Word, text or JPG, and Word, text or images to PDF.

Split PDF

Split a PDF by page ranges, every N pages or page by page, or extract selected pages.

HTML to PDF Converter

Paste HTML or upload a page and get a PDF with page size, margins and page numbers.

PDF Editor

Add text, signatures, highlights and images to a PDF, fill forms and edit pages.

Merge PDF

Combine PDFs and images into one PDF, with page ranges, reordering and bookmarks.

PDF to Word Converter

Convert PDF to editable Word with headings, tables and pictures, or an exact-look copy.

Fill PDF Form Online

Type into PDF form fields, tick boxes and add text to scanned forms, then save.

Remove Password from PDF

Unlock PDFs you can open and remove print, copy and edit restrictions. No upload.

Random generators

Random Number, Password and UUID Generator

Random numbers, strong passwords, passphrases, UUID v4/v7 and random strings, made securely in your browser.

Online Jigsaw Puzzle

Play jigsaw puzzles with real pieces or turn a photo into a puzzle, 12 to 300 pieces.

Education calculators

GPA Calculator

Weighted and unweighted GPA, cumulative GPA, 4.0, 4.3 and 10-point CGPA scales, plus a target GPA planner.

Planning and project tools

Gantt Chart Generator

Make a Gantt chart online with tasks, progress, dependencies and milestones. Export PNG, SVG or CSV, print or share.

Flowchart Builder

Type steps as indented text and get a laid-out flowchart to download as PNG or SVG.

Seating Chart Generator

Arrange guests at tables or students at desks, with rules, auto arrange and print.

Questionnaire Formatter

Turn plain questions into a clean, numbered questionnaire with scales, checks and exports.

Text and writing tools

Word Counter

Count words, characters, sentences and paragraphs, with reading time, keyword density and X, Instagram and SEO limits.

Reverse Text Generator

Write text backwards, reverse words or lines, or flip it upside down and mirror it.

Markdown Editor

Write Markdown with a live preview and export it as Markdown, HTML or PDF.

MLA Citation Generator

MLA 9 works-cited entries and in-text citations for websites, books, articles and videos.

Font Preview

Preview your text in installed fonts, your own font files or Google Fonts.

Spreadsheet and data tools

CSV to Excel Converter

Convert CSV to XLSX with leading zeros, encodings and headers handled, or XLSX back to CSV.

Security and privacy tools

Password strength checker

See how long a password takes to crack, what makes it weak and how to fix it.

Hash Checker

Verify a file's MD5, SHA-256 or SHA-512 checksum without uploading it.

Audio tools

MP3 converter

Convert WAV, M4A, FLAC, OGG and video files to MP3 in your browser.

Video tools

Video Compressor

Compress MP4, MOV and WebM videos to an exact size in MB, without uploading them.

Environment and energy calculators

Carbon Footprint Calculator

Your yearly CO2 from home energy, car, flights and food, with ways to cut it.

Need something built?

Tell us what you want to create.

Tell us what you need built, from a simple website to a complete app, AI solution, automation, or custom system.