Online Developer Tools
Free online tools for developers: Base64, URL, Hex, HTML encoding/decoding, JSON formatting, JWT decoding, hash generation, UUID creation, regex testing
Encoding & conversion
Base64 Decode
Free online Base64 decoder. Convert Base64 strings back to plain text instantly. Runs entirely in your browser. No data is sent to any server.
ExploreBase64 Encode
Free online Base64 encoder. Convert text or data to Base64 format instantly. Runs entirely in your browser. No data is sent to any server.
ExploreColor Converter
Free online color converter. Convert between HEX, RGB, and HSL color formats instantly with a live color preview. Runs entirely in your browser.
ExploreHEIC to JPG Converter
Convert HEIC and HEIF photos to JPG or PNG locally in your browser. Process a batch, adjust output quality and download without uploading photos.
ExploreHex Decode
Free online Hex decoder. Convert hexadecimal strings back to readable text. Runs entirely in your browser. No data is sent to any server.
ExploreHex Encode
Free online Hex encoder. Convert text to hexadecimal representation. Runs entirely in your browser. No data is sent to any server.
ExploreHTML Entity Decode
Free online HTML entity decoder. Convert HTML entities like & < > back to their original characters. Runs in your browser.
ExploreHTML Entity Encode
Free online HTML entity encoder. Escape special characters like <, >, & and quotes to their HTML entity equivalents. Runs in your browser.
ExploreImage Compressor and Resizer
Compress and resize JPG, PNG and WebP images locally in your browser. Adjust quality and dimensions, compare file sizes and download a batch.
ExploreImage Format Converter
Convert WebP, PNG and JPG images locally in your browser. Choose an output format, resize pictures and download individual files or a ZIP archive.
ExploreImage to Base64
Free online image to Base64 converter. Convert images to Base64 encoded strings for use in CSS and HTML. Runs entirely in your browser.
ExploreMorse Code Translator
Morse Code Translator converts text to Morse code and decodes Morse back to text. Free to use, with no sign-up and no limits.
ExploreNumber Base Converter
Number Base Converter instantly converts any whole number between binary, octal, decimal and hexadecimal. Free to use, with no sign-up.
ExploreQR Code Generator
Free QR code generator for branded codes: your colours, rounded or dotted modules, and a letter or logo in the centre. Exports PNG and SVG.
ExploreUnicode Escape / Unescape
Unicode Escape / Unescape converts text to and from \uXXXX escape sequences. Free to use, with no sign-up and no limits.
ExploreURL Decode
Free online URL decoder. Decode percent-encoded URL strings back to readable text instantly. Runs entirely in your browser, with no data sent to any server.
ExploreURL Encode
Free online URL encoder. Percent-encode text for safe use in URLs and query strings instantly. Runs entirely in your browser, with no data sent to a server.
ExploreCode & data
CSS Minifier / Beautifier
Free online CSS minifier and beautifier. Minify CSS to reduce file size or beautify compressed CSS for readability. Runs entirely in your browser.
ExploreHTML to Markdown Converter
HTML to Markdown Converter turns HTML into clean Markdown in your browser. Everything runs in your browser, so nothing you enter is uploaded.
ExploreJSON to CSV Converter
JSON to CSV Converter turns a JSON array of objects into CSV and parses CSV back into JSON. Free to use, with no sign-up.
ExploreJSON Diff Checker
Compare two JSON documents by structure in your browser. Ignore object key order, choose how arrays are compared and download a JSON Patch file.
ExploreJSON Formatter & Validator
Free online JSON formatter and validator. Pretty-print, minify and validate JSON with syntax highlighting. Runs entirely in your browser.
ExploreMarkdown Preview
Free online Markdown editor with live preview. Write Markdown and see rendered HTML side by side. Runs entirely in your browser.
ExploreMarkdown to HTML Converter
Free online Markdown to HTML converter with live preview. Turns Markdown into clean HTML: headings, lists, tables, code blocks and more.
ExploreRegex Tester
Free online regular expression tester. Test regex patterns against sample text with live matching and group highlighting. Runs in your browser.
ExploreSQL Formatter
SQL Formatter formats and beautifies SQL queries for MySQL, PostgreSQL, SQL Server and more. Free to use, with no sign-up.
ExploreXML Formatter
Format and validate XML locally in your browser. Preserve mixed text, comments and CDATA, choose compact output and download the resulting file.
ExploreYAML to JSON Converter
YAML to JSON Converter converts YAML to JSON and JSON back to YAML. Everything runs in your browser, so nothing you enter is uploaded.
ExploreSecurity & identity
Bcrypt Generator & Checker
Bcrypt Generator & Checker hashes passwords with bcrypt and verifies a password against an existing hash. Free to use, with no sign-up.
ExploreHash Generator
Free online hash generator. Produce SHA-1, SHA-256, SHA-384 and SHA-512 digests, or an HMAC signature from a key. Runs entirely in your browser.
ExploreJWT Decoder
Free online JWT decoder. Decode and inspect JSON Web Token header, payload and signature. Runs entirely in your browser. No data is sent to any server.
ExplorePassword Generator
Free online secure password generator. Create cryptographically strong random passwords with customisable length and character sets.
ExploreSSL Certificate Checker
Free online SSL/TLS certificate checker. View certificate details, expiry dates, issuer information and certificate transparency logs for any domain.
ExploreUUID Generator
Free online UUID generator supporting versions 1, 3, 4, 5, 6 and 7. Generate random, time-based, or namespace-hashed UUIDs instantly in your browser.
ExploreNetwork & domains
CIDR / Subnet Calculator
Free online CIDR and subnet calculator. Calculate network address, broadcast, subnet mask, usable host range and more from CIDR notation.
ExploreDNS Lookup
Free online DNS lookup tool. Query A, AAAA, MX, TXT, NS, CNAME and more DNS record types for any domain. Powered by Cloudflare DNS.
ExploreHTTP Header Inspector
Free online HTTP header inspector. View all response headers and security header analysis for any URL. Check HSTS, CSP, X-Frame-Options and more.
ExploreIP Address Lookup
Free online IP address geolocation tool. Look up geographic location, ISP, timezone and network details for any IP address.
ExploreWHOIS Lookup
Free online WHOIS/RDAP domain lookup tool. Find domain registration details, registrar, nameservers, expiration dates and status codes.
ExploreCost calculators
Cloudflare Pricing Calculator
Work out what Cloudflare costs you: Free, Pro, Business or Enterprise plus Workers, R2 and Images usage. Compare plans and see your real monthly total.
ExploreCloudflare Image Transformations Cost Calculator
See what Cloudflare Image Transformations will cost you. Counts unique transformations properly, applies the 5,000 free tier and adds storage and delivery.
ExploreObject Storage Cost Calculator
Compare Amazon S3, Cloudflare R2, Google Cloud, Backblaze B2 and Wasabi on your own storage and egress figures. See which is cheapest and by how much.
ExploreCloudflare R2 Pricing Calculator
Work out your exact Cloudflare R2 bill: storage, Class A and B operations, egress and the free tier. Compares against Amazon S3 and shows what you save.
ExploreText & time
Case Converter
Case Converter changes your text between UPPERCASE, lowercase, Title Case, camelCase, snake_case and more. Free to use, with no sign-up.
ExploreCron Expression Parser
Free online cron expression parser. Understand cron schedules with human-readable descriptions, field breakdown and next execution times.
ExploreLorem Ipsum Generator
Free online Lorem Ipsum placeholder text generator. Generate paragraphs, sentences, or words of dummy text for design and development.
ExplorePDF Merge and Split
Merge PDF files, extract selected pages or split a PDF into separate pages in your browser. Reorder files and download without uploading documents.
ExploreText Analyzer
Free online text analyzer. Count characters, words, sentences, paragraphs, and estimate reading time. Runs entirely in your browser.
ExploreText Diff Checker
Free online text comparison tool. Compare two blocks of text side by side and highlight the differences. Runs entirely in your browser.
ExploreTimestamp Converter
Free online Unix timestamp converter. Convert between Unix epoch timestamps and human-readable dates. Supports seconds and milliseconds.
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