2000+ free tools · 768 tested APIs · 100% in your browser
Every tool you need, one byte away
ByteTools by ByteVancer — image converters, PDF utilities, text and code formatters, SEO generators, calculators and more. Your files never leave your device.
- Files never uploaded
- Instant, no queues
- Free forever
- Installable PWA
Most used
Start with a favourite
The twelve tools people open most on ByteTools.
Image Compressor
Compress JPG, PNG and WebP images in your browser with an adjustable quality slider. See before/after file size and download the smaller image free.
Merge PDF
Combine multiple PDF files into one document in your browser. Reorder files before merging, no upload, no watermark — free online PDF merger.
JSON Formatter
Format, beautify and minify JSON online with 2-space, 4-space or tab indentation. Sort keys alphabetically and catch syntax errors instantly — free and private.
Word Counter
Count words, characters, sentences, paragraphs and estimated reading time instantly. Free online word counter for essays, blogs and social media.
QR Code Generator
Create QR codes for URLs, Wi-Fi, email, phone and SMS. Pick size, colors and error correction, then download a crisp PNG — free and private.
Password Generator
Generate strong random passwords with cryptographically secure randomness. Choose length and character sets, see entropy strength, copy instantly.
Percentage Calculator
Calculate what X% of a number is, what percent one number is of another, and percentage increase or decrease between two values — instantly and free.
JPG to PNG Converter
Convert JPG or JPEG images to PNG format instantly in your browser. Batch convert multiple files at once and download each PNG — free, no uploads.
Unit Converter
Convert between units of length, weight, temperature, area, volume, speed, time and data storage instantly, with a swap button and common conversion tables.
Color Picker
Pick any color and get its HEX, RGB and HSL values instantly. Free online color picker with shades, tints and one-click copy for designers and developers.
Base64 Encoder
Encode text or files to Base64 instantly in your browser. UTF-8 safe, with a URL-safe Base64 option, copy and download. Free online Base64 encoder.
UUID Generator
Generate 1–100 cryptographically random UUID v4 identifiers at once. Uppercase and hyphen-less options, per-item copy and copy-all. Free UUID generator.
Free APIs
A public API directory we actually tested
768 APIs documented with a real curl example and the exact response we got back, plus 2,227 more catalogued. Dead endpoints are removed, not listed.
- 768
- tested & documented
- 2,227
- APIs catalogued
- 26
- categories
- 0
- API keys needed to start
- Developer & Testing APIs86 tested
- Finance & Crypto APIs79 tested
- Game & Anime APIs64 tested
- Government & Open Data APIs63 tested
- Science & Space APIs61 tested
- Geolocation & IP APIs45 tested
- Transport & Vehicle APIs41 tested
- Entertainment APIs29 tested
Browse
Every category, one grid
2000 tools across 25 categories — pick a lane.
Image Tools
132 tools
Convert, compress, resize, rotate, watermark and edit images directly in your browser. JPG, PNG, WebP, AVIF, HEIC, GIF, SVG and ICO supported — no uploads, fully private.
PDF Tools
62 tools
Merge, split, rotate, reorder and number PDF pages, convert images to PDF and PDFs to images. All processing happens locally in your browser.
Text Tools
110 tools
Word counters, case converters, line sorters, duplicate removers, text comparison and lorem ipsum generators for writers, students and developers.
Developer Tools
102 tools
JSON, XML, HTML, CSS, JavaScript and SQL formatters and minifiers, Base64 and URL encoders, JWT decoder, hash generators and UUID tools.
Data & Format Converters
78 tools
Convert CSV, JSON, XML and TSV, clean and view CSV, generate Markdown and HTML tables, diff JSON, query with JSON paths and turn JSON into TypeScript or Go — all in your browser.
SEO Tools
78 tools
Generate meta tags, Open Graph and Twitter cards, JSON-LD structured data, robots.txt, sitemaps, canonical and hreflang tags for better search visibility.
Calculators
52 tools
Percentage, discount, GST, VAT, EMI, BMI, age, area, binary and scientific calculators plus a universal unit converter — instant and accurate.
Unit Converters
368 tools
Convert length, weight, temperature, volume, area, speed, time, data storage, pressure, energy and angles between any units — instant, accurate and 100% in your browser.
Math Tools
98 tools
Fraction, ratio, average, standard deviation, prime, GCD/LCM, quadratic, permutation, Roman numeral, triangle and base-conversion calculators — instant, accurate and free.
Finance Calculators
93 tools
Loan, mortgage, compound and simple interest, ROI, margin, sales tax, savings, debt payoff, inflation and invoice tools to plan money decisions with confidence.
Color & CSS Tools
67 tools
Color pickers, palette and gradient generators, HEX/RGB/HSL converters, contrast checker and CSS generators for shadows, borders and clip paths.
GIS & Map Tools
46 tools
Convert between KML, GeoJSON and GPX, generate KML circles and polygons, convert coordinates and calculate distances between locations.
Date & Time Tools
54 tools
Unix timestamp converters, time zone converter, date difference calculator and countdown timers for scheduling and development work.
Security & Encryption Tools
58 tools
Encrypt and decrypt text with AES, generate HMACs and file checksums, check password strength, validate card numbers and play with classic ciphers — all locally in your browser.
Generators
53 tools
Generate strong passwords, QR codes, barcodes, random numbers and random names instantly in your browser.
Audio Tools
52 tools
Convert, compress, trim and edit audio between MP3, WAV, AAC, OGG, FLAC and M4A right in your browser. Powered by ffmpeg.wasm — nothing is uploaded.
Video Tools
51 tools
Convert, compress, trim, mute and extract audio or frames from MP4, WebM, MOV, AVI and MKV videos locally in your browser. Powered by ffmpeg.wasm — no uploads.
Health & Fitness Calculators
62 tools
Calorie, TDEE, BMR, body fat, macro, ideal weight, water intake and running pace calculators. Metric and imperial, instant results, nothing ever uploaded.
Student & Education Tools
60 tools
GPA and CGPA calculators, grade and final-grade planners, attendance percentage, typing speed tests and study planners for students and teachers.
Network & IP Tools
48 tools
Subnet and CIDR calculators, IPv4/IPv6 converters and validators, DNS record builders and bandwidth calculators — pure math, computed locally in your browser.
Ohm's law, force, energy, projectile, molar mass, dilution, half-life and resistor calculators for students and engineers. Instant, accurate and 100% in your browser.
Social Media Tools
51 tools
Character counters and post previews for X, Instagram, LinkedIn and TikTok, hashtag formatters, bio and caption helpers — all processed locally, nothing uploaded.
Writing Tools
61 tools
Readability scorers, sentence and paragraph analyzers, outline builders, quote formatters and writing-productivity utilities for authors, students and copywriters.
Business Tools
63 tools
Generate invoices, quotes, receipts and purchase orders as PDFs, track timesheets and calculate burn rate, churn, LTV and MRR — all locally in your browser.
Home & DIY Calculators
51 tools
Paint, concrete, tile, flooring, mulch, gravel, roofing, drywall, BTU and stair calculators that estimate materials and costs for your next DIY project.
By job
Built for the work you actually do
Why ByteTools
Private by architecture, not by promise
Private by design
Files are processed locally in your browser and never uploaded to a server.
Instant results
No queues, no accounts, no watermarks — tools load fast and work offline as a PWA.
Free forever
Every tool is completely free for personal and commercial use.
Works everywhere
Responsive design that works on desktop, tablet and mobile, installable as an app.
All 2000 tools and 768 APIs. Zero uploads.
Browse the full catalogue or read the guides.