All tools
75 tools for developers and ad-tech engineers. Search or filter by category.
JSON Formatter
Beautify, minify, sort, query and repair JSON with a tree view and copy-as code export.
JSON Validator
Validate JSON syntax and JSON Schema, catch duplicate keys and precision loss, check NDJSON line by line.
JSON Minifier
Minify JSON, strip nulls, measure gzip size and encode as Base64 or URL-safe text.
JSON to YAML
Convert JSON into clean YAML with control over quoting, wrapping, anchors and multi-document output.
YAML to JSON
Convert YAML into strict JSON, with multi-document streams, YAML-only types and duplicate keys handled.
JSON to CSV
Flatten JSON arrays into CSV with a table preview, column picker, nested-path selection and Excel options.
CSV to JSON
Parse CSV into JSON objects, arrays, columns or NDJSON with a table preview and type inference that keeps IDs intact.
XML to JSON
Convert XML to JSON and JSON back to XML, with attribute, text-node, namespace and array controls.
TOML to JSON
Convert TOML config to JSON and JSON back to TOML, with Cargo, pyproject and netlify presets.
JSON Diff
Compare two JSON documents side by side, ignore keys, match arrays by id and export JSON Patch or Merge Patch.
JSON Path Finder
Explore JSON as a tree, click any value to copy its path in 7 syntaxes, and evaluate JSONPath or jq queries.
Base64 Encode / Decode
Encode text, hex or any file to Base64 (and Base32, Base58) and decode back — with data URIs and image preview.
URL Encode / Decode
Percent-encode text with encodeURIComponent, encodeURI, form or RFC 3986 rules, decode multi-layer strings, and edit query strings in a table.
HTML Entity Encode / Decode
Encode text to HTML entities with presets (minimal, attribute-safe, all non-ASCII) and decode all 2,000+ HTML5 named references.
JWT Decoder
Decode, verify (HS/RS/ES/PS, JWKS) and sign JWTs
JWT Debugger
Verify and sign JWTs with a secret, public key or JWKS.
Unicode Escape / Unescape
Convert text to \uXXXX, \u{…}, \x, U+, &#x…;, Python, Go or CSS escapes and back, and inspect every code point for invisible or look-alike characters.
Password Generator
Strong random passwords, diceware passphrases, PINs and pronounceable codes with crack-time estimates.
UUID Generator & Inspector
Generate UUID v1/v3/v4/v5/v6/v7, ULIDs and nanoids in bulk, inspect any UUID, and validate lists.
Hash Generator
MD5, SHA-1, SHA-256/384/512, SHA-3, CRC32 and xxHash32 for text, lines and files — with verify and checksum export.
HMAC Generator & Verifier
Sign and verify HMAC-SHA256/SHA1/SHA512/MD5/SHA-3 signatures with Stripe, GitHub, Shopify, Slack and Twilio presets.
Bcrypt Generator / Checker
Hash passwords with bcrypt, verify hashes, generate salts and benchmark cost factors on your device.
QR Code Generator
QR codes for URLs, Wi-Fi, vCards, SMS, email, geo, events, WhatsApp, 2FA and crypto — with logo, styles and print-ready export.
Lorem Ipsum Generator
Placeholder text by paragraph, sentence, word or exact character count — plain, structured HTML, Markdown or JSON, in eight flavours.
Random Number Generator
Random integers and decimals, normal/exponential/weighted distributions, dice rolls, coin flips, and list shuffles or raffle picks.
Word Counter
Count words and characters, score readability, and check platform limits.
Case Converter
Convert text between camelCase, snake_case, kebab-case, Title Case and 15 more — per line or as a whole.
Slug Generator
Turn titles into clean URL slugs with transliteration for Cyrillic, Greek, Arabic and more, stop-word removal, templates and uniqueness.
Text Diff
Compare two texts side-by-side with word-level highlights and export a unified patch.
Markdown Preview
Live split-pane Markdown editor with highlighted code blocks, TOC and styled HTML export.
String Escape / Unescape
Escape or unescape strings for JSON, JS, HTML, XML, URL, regex, shell, CSV, SQL, Python, Java, C#, Go, YAML and .properties.
Regex Tester
Test regular expressions with in-place highlighting, a token-by-token explainer and code export.
Cron Expression Parser
Parse, build and explain cron expressions with next/previous runs, timezones and YAML export.
CSS Minifier
Minify CSS safely — strings, url() and calc() preserved — with gzip size and duplicate-selector merging.
JavaScript Minifier
Minify JavaScript with Terser or beautify JS/TS with Prettier — with real gzip sizes.
SQL Formatter
Format, minify and highlight SQL for 14 dialects with placeholder substitution.
HTML / CSS Prettifier
Beautify or minify HTML, CSS, SCSS, Less, JS, TS, JSON, YAML, Markdown and more — with preview and lint.
HTTP Status Codes
Searchable reference for every HTTP status code.
Color Converter
Convert any CSS colour between HEX, RGB, HSL, HWB, LAB, LCH, OKLCH and P3, with contrast checks and ramps.
Number Base Converter
Convert between binary, octal, decimal, hex and any base 2–36, with a bit grid, bitwise ops and IEEE-754.
Unix Timestamp Converter
Convert Unix timestamps (s, ms, µs, ns) to dates and back, across time zones, with custom formats and code.
Markdown to HTML
Convert Markdown to clean HTML — fragment, full styled document or single line — with JSX export.
URL Parser & Query Editor
Break any URL into parts, edit query params live, unwrap nested redirect URLs, decode ad macros, build UTMs and follow redirects.
User-Agent Parser
Parse any User-Agent — browsers, in-app webviews, CTV (Roku, Tizen, webOS, Fire TV), bots — merge Client Hints and get an OpenRTB device object.
Image Converter & Base64
Convert, resize and compress images to PNG, JPEG, WebP or AVIF and encode or decode Base64 data URIs.
SVG Optimizer
Optimize SVGs with SVGO and export as React, Vue, Svelte, data URI, sprite or PNG.
Color Palette Generator
Build accessible palettes from a seed colour or an image, with Tailwind and token exports.
Percentage Calculator
Nine percentage modes: of, what %, of what, change, add/subtract, reverse, points, CAGR and fractions.
Date Difference Calculator
Days between dates, business days with holidays, date ± N, age and live countdowns.
Byte / Data Size Converter
Convert data sizes between SI and binary units side by side, and calculate transfer times.
Aspect Ratio Calculator
Solve dimensions for any ratio, fit or crop into a box, and get resolution tables and CSS snippets.
Text to Binary
Convert text or files to binary, hex, octal or decimal bytes and back, with a hex dump, per-character byte table and five encodings.
HEX to RGB
Convert HEX colour codes to RGB and back with sliders, a picker and Tailwind snippets.
IP Address Lookup & Subnet Calculator
Look up any IP: RDAP owner and ASN allocation, reverse DNS, what’s-my-IP, IPv4/IPv6 subnet math, bulk classification.
CSS Gradient Generator
Design linear, radial and conic gradients with draggable stops, layers and Tailwind, CSS or SVG output.
Box Shadow Generator
Design box-shadow, text-shadow and drop-shadow() with layers, presets and a light/dark preview.
chmod Calculator
Convert between numeric and symbolic Unix permissions, with umask, warnings and recipes.
VAST Inspector
Fetch or paste VAST 2/3/4 tags — follow wrapper chains, validate, ping pixels, and play media files.
VMAP Parser
Fetch or paste VMAP 1.0 manifests — timeline preview, resolve every AdTagURI to VAST, validate, and ping break trackers.
VAST Ad Tester (IMA Player)
Play any VAST or VMAP tag in a real Google IMA player and watch every SDK event, error and timing.
Ad Tag Tester
Render a display ad tag in a sandboxed frame and see every request, click-through, console line and load time.
IAB TCF Consent Decoder
Decode TCF v2.2 consent strings with vendor names from the Global Vendor List, a purpose × vendor matrix and an encoder.
IAB GPP Decoder
Decode and edit Global Privacy Platform strings — US National and state sections with plain-English legends, TCF EU, gpp_sid checks.
OpenRTB Inspector
Validate & annotate OpenRTB 2.6 BidRequest and BidResponse JSON.
RTB Bidder Sandbox
A live OpenRTB bidder endpoint that captures every bid request and answers with bids, no-bids, custom templates or timeouts.
OpenRTB Request Builder
Build OpenRTB 2.6 bid requests with a form or JSON, then send them to any bidder and inspect the response.
Bid Response Inspector
Decode an OpenRTB BidResponse: bids, macros, no-bid reasons, creative preview and win/billing notice firing.
RTB & Ad Revenue Calculator
eCPM, CPC, CPA and CPV conversions, fill and revenue projections, rev-share chains, bid shading, auction clearing and budget pacing.
ads.txt / app-ads.txt Validator
Fetch any domain's ads.txt or app-ads.txt, validate it against the IAB 1.1 spec, follow SUBDOMAIN pointers, and cross-check every line against exchange sellers.json files.
sellers.json Inspector
Fetch any exchange's sellers.json by domain, validate it against the IAB spec, cross-check a publisher's ads.txt against it, and resolve OpenRTB supply chains.
HLS m3u8 Parser
Fetch or paste HLS playlists — drill from master to variants, validate the ladder, HEAD-check segments, decode SCTE-35 cues.
WebSocket Tester
Connect to any ws:// or wss:// endpoint, send text/JSON/binary frames, measure RTT, and debug Socket.IO, STOMP, graphql-ws and MQTT handshakes.
Request Bin
Get a unique URL that captures every webhook or HTTP request and shows it live — headers, body, query, raw wire format.
HTTP Request Tester
Send GET, POST, PUT and other requests to any public URL and inspect status, headers, body, redirects and timing.
MIME Type Lookup
Find the right Content-Type for any extension, check what a URL actually serves, and identify files by magic bytes.