Free online tools, no login required

Calculators, developer utilities, PDF converters, design helpers and AI-powered tools — all in one clean, fast place. Just open and use.

PDF Tools AI Image Tools Astrology Text Tools

Latest: Metabolite–Pathway Enrichment Sankey Generator Energy Flow Sankey Diagram Generator Five-Stage Pastel Gradient Sankey Diagram Generator Circular Evidence Network Plot Generator Spectral Ring Chord Diagram Generator

100% free forever No sign-up, no install Fast & privacy-friendly

Latest tools

Recently added tools.

Metabolite–Pathway Enrichment Sankey Generator

Render a two-column metabolite → pathway enrichment Sankey plus a matching right bubble panel in one chart. Ribbons use one flat light-gray tone at ~0.6 opacity so overlaps darken; every label sits to the left of its bar, right-aligned and vertically centered with no pill; ~50 pastel metabolites feed 11 gem-toned pathways; the bubble panel aligns row-by-row, x = -Log(Pvalue), area = Count, red shade = Hit Ratio. Light / dark canvas and PNG / SVG export.

Energy Flow Sankey Diagram Generator

A free-depth energy flow Sankey that renders energy sources → conversion carriers → end uses in one chart, in UK DECC style. Every node takes an earthy multi-hue color, ribbons blend a source-to-target gradient at ~0.2 low opacity, and all node labels sit to the right of their bars with no background. Three palettes, light / dark canvas and PNG / SVG export.

Five-Stage Pastel Gradient Sankey Diagram Generator

A five-stage Sankey that renders source → transit → hub → channel → destination in one chart. Every node takes its own pastel color, ribbons blend a source-to-target gradient at low opacity, and slim nodes carry white pill labels on the inner columns. Three soft palettes, light / dark canvas and PNG / SVG export.

Circular Evidence Network Plot Generator

Generate a circular evidence network from independently entered patient totals and pairwise study counts in CSV. Node area shows patients and curve width shows studies, with local processing, light/dark mode and PNG/SVG export. No statistical analysis.

Spectral Ring Chord Diagram Generator

Turns a pairwise relationship matrix into a spectral ring: nodes run clockwise from the largest total to the smallest, arc colors are sampled along one continuous ramp so hue is the ranking itself (reddest biggest, bluest smallest), every relationship is a uniform thin teal line bending toward the centre, and white dividers inside an arc are that node’s connection list. Dark mode and PNG / SVG export included.

Group Flow Chord Diagram Generator

Draws “many sources into a few groups” as one ring: the left half holds small source arcs in a single purple, the right half holds group arcs one colour each with a matching vertical legend, arc width equals node totals, and ribbons are tinted by their target group. White dividers inside group arcs show at a glance how many sources feed each one. Built for sample classification, channel attribution, topic assignment and batch destinations, with dark mode and PNG / SVG export.

Circos Collinearity Chord Diagram

A Circos collinearity chord diagram treats ring segments as continuous coordinate tracks instead of discrete nodes: outer ticks show positions and thin curves in the center map one interval to another. Built for genome synteny, block migration, address-range remapping, batch reassignment and stratigraphic comparison, with light/dark mode and PNG / SVG export.

Double Fan Colorful Chord Diagram Generator

A double-fan colorful chord diagram turns bipartite flows into an hourglass: five solid-colored arcs fan across the top and five pastel arcs fan across the bottom along one circle, with open gaps at 3 and 9 o’clock. Translucent colored ribbons cross the center waist, and every sector carries its own tick axis starting at 0 with majors every 10 units. Built for channel flows, cost allocation and requirement coverage; dark mode and PNG / SVG export.

AI-powered

Smart tools, built with AI

Our growing focus: online tools that combine everyday utility with AI. Free and no login, of course.

AI Pet Background Remover — Remove & Replace Pet Photo Backgrounds

Free AI-powered pet background remover. Instantly remove backgrounds from cat, dog & pet photos. Get transparent PNG or replace with colors, gradients & scenes. No signup required.

Image to Text OCR

Extract text from images in more than 100 languages with browser-based OCR powered by Tesseract.js.

Simple Image to Text OCR

Upload an image, choose a language, and extract copyable plain text in seconds with a minimal OCR workflow.

Receipt and Invoice OCR

Extract structured text from receipts, invoices, and tickets, including dates, amounts, sellers, and detected document type.

Online Image Denoiser - Remove Noise, Enhance Quality

Remove noise from images with bilateral, median, and Gaussian filters. Edge-preserving denoising runs entirely in your browser.

Image Watermark Tool

Add text or image watermarks to photos with controls for font, color, opacity, position, tiling, and output.

AI Watermark Remover

Remove logos, subtitles, and common watermarks automatically with AI, without manual brushing or masking.

Product Background Remover

Remove backgrounds from product photos automatically and export clean transparent PNGs for listings, catalogs, and ads.

View all AI tools

Browse by category

9 categories covering everything from math to media.

8 tools

PDF Convert

PDF to Word Converter · PDF Watermark · PDF Compressor

23 tools

Image Tools

AI Pet Background Remover — Remove & Replace Pet Photo Backgrounds · Image to Base64 Converter · Base64 Encoder and Decoder

4 tools

Astrology

Natal Chart Calculator · Numerology Calculator · Synastry Compatibility Calculator

5 tools

Text Tools

Sketch-Style Chart Generator · Markdown Editor · Text Case Converter

36 tools

Design

Circular Evidence Network Plot Generator · Pantone Color Picker · Color Wheel Studio

6 tools

Media

Free M3U8 Online Player - One-Click Instant Streaming · Artistic QR Code Generator · QR Code Generator

9 tools

Calculators

Loan Calculator · Tip Calculator · Mortgage Calculator

11 tools

Developer

Secure Password Generator · Hash Generator · MD5 Generator and Checker

3 tools

Timers

Countdown Timer · 3D Flip Clock · Schedule Calendar

PDF Convert

8 free tools · no login

See all

PDF to Word Converter

Convert PDFs to editable Word documents while preserving paragraphs, tables, and images, and also export Office files to PDF.

PDF Watermark

Add custom text watermarks to PDFs with adjustable font size, color, opacity, rotation, and position. Tile mode for repeating watermarks.

PDF Compressor

Reduce PDF file size with adjustable compression levels while keeping text readable and images usable.

PDF Encrypt and Decrypt

Protect PDFs with AES-256 passwords or remove password protection from files you are allowed to unlock.

Image Tools

23 free tools · no login

See all

AI Pet Background Remover — Remove & Replace Pet Photo Backgrounds

Free AI-powered pet background remover. Instantly remove backgrounds from cat, dog & pet photos. Get transparent PNG or replace with colors, gradients & scenes. No signup required.

Image to Base64 Converter

Convert images to Base64, Data URI, CSS, HTML, or JSON output in your browser, with optional compression for smaller results.

Base64 Encoder and Decoder

Encode or decode text and files as Base64 locally in your browser, with image preview and quick copy tools.

Online Vector SVG/DXF/EPS Format Converter

Free online vector format converter. Convert between SVG, DXF, and EPS in any direction — all processing done locally in your browser.

Astrology

4 free tools · no login

See all

Natal Chart Calculator

Generate a birth chart from date, time, and location, including the wheel chart, ASC and MC points, and major planetary positions.

Numerology Calculator

Free Pythagorean numerology calculator. Enter your name and birth date to get your Life Path, Destiny, Soul Urge, Personality and Personal Year numbers.

Synastry Compatibility Calculator

Compare two birth charts with compatibility scores, dual-chart views, and radar-style relationship insights.

AI Daily Horoscope

Generate a daily horoscope from natal chart data, with uplifting guidance across general, career, and relationship themes.

Text Tools

5 free tools · no login

See all

Sketch-Style Chart Generator

Charts that look hand-sketched: bars, horizontal bars, pies and donuts are drawn with roughViz.js irregular jittery strokes, like a quick sketch on a whiteboard that still keeps true proportions. Paste 2 to 12 rows of data and export crisp SVGs for sketch-style slides, prototypes and editorial graphics.

Markdown Editor

Write Markdown with live preview, GitHub-flavored formatting, and one-click export to Markdown or HTML.

Text Case Converter

Convert text to sentence case, title case, UPPERCASE, lowercase, camelCase, and more, then copy or export the result.

List Sorter

Sort text and numbers online with alphabetic, numeric, natural, and length modes. Dedup, delimiter, column sort, export to CSV/TXT/JSON.

Design

36 free tools · no login

See all

Circular Evidence Network Plot Generator

Pantone Color Picker

Pick any color and find the nearest Pantone reference instantly, with ready-to-copy HEX and RGB values for design and print workflows.

Color Wheel Studio

Explore colors with an interactive wheel, fine-tune HEX, RGB, HSL, and HSV values, and save palettes directly in your browser.

Color Scheme Generator

Generate color schemes from a base color using 7 harmony rules with live UI preview and export to HEX, Tailwind, or CSS variables.

Media

6 free tools · no login

See all

Free M3U8 Online Player - One-Click Instant Streaming

Play M3U8 and HLS streams in your browser with quality switching, playlist inspection, and quick testing tools for both live and on-demand video.

Artistic QR Code Generator

Design branded QR codes with custom dots, corners, logos, colors, transparent backgrounds, and PNG or SVG export.

QR Code Generator

Generate clean QR codes from text or URLs with size, color, corner radius, and error-correction controls.

Random Lottery Picker

Run a browser-based prize draw with custom prizes, participant lists, winner counts, local history, and exportable results.

Calculators

9 free tools · no login

See all

Loan Calculator

Estimate payments for amortized loans, deferred-payment loans, and simple bond scenarios with clear cost breakdowns and repayment schedules.

Tip Calculator

Free online tip calculator with multi-currency support, bill splitting, and rounding options. Essential for travelers and group dining.

Mortgage Calculator

Calculate monthly mortgage payments, total interest, and amortization schedules from home price, down payment, interest rate, and loan term.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Live clock with real-time seconds and milliseconds, copy with one click.

Developer

11 free tools · no login

See all

Secure Password Generator

Generate strong random passwords locally with length controls, character set options, exclusions, and instant strength feedback.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512, and HMAC hashes from text or files entirely in your browser.

MD5 Generator and Checker

Generate MD5 hashes, compare two MD5 results, and create random passwords with instant MD5 output in one simple browser tool.

JSON Formatter and Validator

Format, validate, repair, search, and inspect JSON in a cleaner editor built for developers, APIs, and configuration files.

Timers

3 free tools · no login

See all