Top Dev Tools APIs on API.market

Browse our collection of high-quality Dev Tools APIs

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Code & formatting
5.0(4)

Free, Effortless Image & Video Upload and Retrieval Service

1.1Kโ€ข628K
1M FREE API units
URL & QR utilities

Generate QR codes and EAN-13, UPC-A, Code 128 and Code 39 barcodes as PNG or SVG, and read them from images or image URLs.

0โ€ข0
500 FREE API units
Document & PDF tools

Upload a PDF or send its URL and get plain text, Markdown or page-by-page text, with metadata and a list of scanned pages.

0โ€ข0
50 FREE API units
URL & QR utilities

Get the title, description, image, favicon, site name and canonical URL of any public page, with a 5 second limit per request.

0โ€ข0
500 FREE API units
Parsing & extraction

Validate the schema.org JSON-LD of any URL or pasted markup and get coded issues, rich-result checks, a grade and a score.

1โ€ข2
500 FREE API units
Parsing & extraction

Find a site's Web App Manifest and get a JSON report with coded issues, an A+ to F grade and a Chrome installability verdict with blockers.

1โ€ข3
500 FREE API units
Code & formatting

Generate unique, stylized character avatars from text prompts in seconds with Tencent's Instant Character AI modelโ€”ideal for games, media, and apps.

6โ€ข0
$0.05 per API unit
Code & formatting

Expand images beyond their borders in high resolutionโ€”generate new pixels for flawless, seamless resizing in seconds with licensed commercial-safe AI.

3โ€ข6
$0.05 per API unit
URL & QR utilities

Turn any text or link into a crisp SVG QR code with your own size, colors, margin and error correction level, as an image or JSON.

1โ€ข2
$5/month
URL & QR utilities

Check any link's HTTP status, full redirect chain, final URL, server and response time, and batch up to 20 URLs in one POST request.

1โ€ข3
$5/month
URL & QR utilities

Expand bit.ly, t.co, TinyURL and any redirecting link to its final destination, with every hop of the redirect chain and the final HTTP status.

1โ€ข2
$5/month
URL & QR utilities

Generate scannable Code 128 and EAN-13 barcodes as SVG with an automatic EAN check digit, custom bar height, bar width and an optional text line.

1โ€ข2
$5/month
Parsing & extraction

Turn the HTML tables on any web page into JSON rows, JSON objects keyed by header, or CSV, with the page's table count and captions.

2โ€ข2
$5/month
Parsing & extraction

Parse any User-Agent string into browser and version, operating system and version, device type, rendering engine and a bot flag.

1โ€ข2
$5/month
Parsing & extraction

Get the current time or any date in an IANA time zone with UTC offset, weekday and Unix time, and convert one moment into many zones at once.

1โ€ข2
$5/month
Code & formatting

Convert GitHub-flavored Markdown with tables, lists and code blocks into safe HTML, with scripts and inline event handlers stripped by default.

1โ€ข2
$5/month
Code & formatting

Convert JSON arrays to CSV with nested objects flattened, and CSV to JSON with automatic delimiter detection, quoted fields and numbers.

1โ€ข3
$5/month
Code & formatting

Convert XML to JSON with attributes kept, JSON to XML, YAML to JSON and JSON to YAML. POST the document and get the converted result back.

1โ€ข5
$5/month
Code & formatting

Convert between 300+ units of length, weight, volume, temperature, speed, data and more, and safely evaluate math expressions in one API.

1โ€ข3
$5/month
Code & formatting

Generate lightweight SVG placeholder images at any width and height with your own background color, text color and label, for mockups and prototypes.

1โ€ข2
$5/month
Code & formatting

Convert a color between HEX, RGB, HSL and CMYK, get palettes, shades and tints, the best text color and the WCAG contrast ratio with a second color.

1โ€ข2
$5/month
Document & PDF tools

Turn JSON with line items, quantities, prices and tax into a PDF invoice, or make a simple PDF from text. Get the PDF file or a Base64 string.

1โ€ข2
$5/month
Code & formatting

Generate lorem ipsum paragraphs, sentences, words, list items or titles as JSON, plain text or HTML, with seeded output for repeatable tests.

1โ€ข2
$5/month
Code & formatting

Generate realistic fake users, addresses, companies, products, posts and transactions in 6 languages, or rows from your own JSON schema.

1โ€ข9
$5/month
Code & formatting

Hash text with MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 in one call, sign messages with HMAC and identify which algorithm made a hash.

1โ€ข4
$5/month
Parsing & extraction

Convert dates between 13 calendars such as Hijri, Hebrew, Persian and Chinese, and get Islamic, Jewish, Chinese and Persian holidays, 1900 to 2100.

1โ€ข5
$5/month
Parsing & extraction

Convert numbers and money amounts to words in English, Spanish, French, German, Portuguese and Italian for cheques, invoices and contracts.

1โ€ข2
$5/month
URL & QR utilities

Generate SVG initials avatars from any name with deterministic colors, circle, rounded or square shapes, custom sizes and a JSON data URI option.

1โ€ข2
$5/month
Parsing & extraction

Validate a domain's security.txt for Contact, Expires, syntax and expiry, with coded issues as JSON. ads.txt is checked too.

1โ€ข2
500 FREE API units
Parsing & extraction

Check the cookies a URL sets for missing Secure, HttpOnly and SameSite flags and RFC violations, with coded issues and a grade.

1โ€ข3
$9/month
Parsing & extraction

SEO checker API and technical SEO audit API for one URL: indexability verdict and score, robots, canonical, meta tags, headings, hreflang and sitemap.

3โ€ข6
50 FREE API units
Parsing & extraction

Check any URL's Cache-Control, Expires and ETag headers and get a cacheability verdict, freshness lifetime and misconfiguration list as JSON.

1โ€ข14
500 FREE API units
URL & QR utilities

Preflight endpoints, verify search results and rank award-flight options with deterministic JSON responses.

By ayl
3โ€ข10
50 FREE API units
developer-tools

Blake2B/MD5/SHA Text/File/Bytes Hashing

2โ€ข11
5 FREE API units
Code & formatting

Recover readable source from obfuscated JavaScript. Decrypts string arrays, folds constants, removes dead code โ€” via AST, no execution of untrusted code.

1โ€ข24
30 FREE API units
Parsing & extraction

Harmonize incompatible Parquet schemas automaticallyโ€”free for ordinary unions, pay only when residual reconciliation is needed.

2โ€ข6
$0.03 per API unit
URL & QR utilities

Pre-flight validation for autonomous agents: check URLs, wallet balances, gas conditions and execution assumptions before a costly action.

1โ€ข5
$0.025 per API unit
Parsing & extraction

Check WordPress plugin releases for update risk before deployment.

1โ€ข3
100 FREE API units
developer-tools

Color generation, conversion, contrast checking, and palette generation

1โ€ข16
100 FREE API units
Document & PDF tools

Fast, accurate text extraction and line-by-line diff generation for PDF documents with precise change metrics.

1โ€ข5
50 FREE API units
Parsing & extraction

Expand an iCalendar RRULE into occurrence timestamps between a start and end time. Built for calendar, scheduling, and reminder apps.

2โ€ข14
500 FREE API units
Document & PDF tools

Generate print-ready Avery-compatible label PDFs from structured data or imported files.

3โ€ข14
50 FREE API units
URL & QR utilities

Generate barcode images in PNG or base64. Supports Code128, EAN13, and EAN8 formats.

1โ€ข4
$10/month
URL & QR utilities

Rapidly perform diverse encoding, conversion, generation, and security tasks with this high-performance, zero-dependency multi-tool API.

1โ€ข8
$25/month
Parsing & extraction

Inspect public pages for forms, API and webhook signals, security headers, robots rules, latency, and automation-readiness risks.

1โ€ข9
$0.04 per API unit
Screenshot & capture

Capture full-page screenshots, extract clean article text, and generate extractive summaries efficiently with the versatile Webcontent API.

2โ€ข13
100 FREE API units
Parsing & extraction

Instantly parse any user agent string to precisely extract browser, OS, device type, and version, supporting all major platforms.

1โ€ข3
100 FREE API units
Code & formatting

Efficiently generate RFC-compliant UUIDs, supporting versions 1 (time-based) and 4 (random), with powerful batch generation of up to 100 per request.

1โ€ข5
100 FREE API units
Code & formatting

Instantly convert text to URL-friendly slugs, masterfully handling Unicode, special characters, and diverse languages for robust, consistent web links.

1โ€ข6
100 FREE API units
Code & formatting

Generate up to 100 realistic fake user profiles instantly, complete with comprehensive details like name, email, and job, perfect for rapid prototyping and robu

1โ€ข3
100 FREE API units
URL & QR utilities

Generate QR codes instantly from text or URL, returning high-performance PNG or Base64 for quick embedding and downloads.

1โ€ข3
100 FREE API units
Document & PDF tools

Swiftly extract clean, paginated text from PDFs using direct upload or URL, powered by a fast PyMuPDF backend.

4โ€ข19
100 FREE API units
Code & formatting

Automatically optimize Python data types and database schemas to reduce storage 30-75%, cutting cloud bills and speeding up applications effortlessly.

1โ€ข8
$19/month
Parsing & extraction

Convert across 19 unit categories with auto-detection, compound parsing, batch, locale formatting, and cooking conversions. Stateless and fast.

2โ€ข10
100 FREE API units
Code & formatting

Generate comprehensive SEO, performance, and content reports for any URL. Export structured JSON reports with actionable insights in one API call.

2โ€ข0
50 FREE API units
Code & formatting

The Vector Search API enables users to discover free-to-use vector icons from a vast library of over 700,000+ icons. Each icon is accompanied by a license type.

5โ€ข1
1.5K FREE API units
Storage & key-value

The Store Key-Value API is a lightweight, high-performance cloud-based storage solution that enables developers to store, retrieve, and manage key-value pairs.

7โ€ข2
100 FREE API units
Code & formatting

Analyze websites in real-time for comprehensive SEO insights, delivering a score, identifying issues, and suggesting fixes for enhanced search performance.

2โ€ข6
500 FREE API units
URL & QR utilities

Instantly shorten long URLs with impressive speed, enhancing user experience across platforms with ease.

1โ€ข1
$6/month
Parsing & extraction

Fetch and parse XML sitemaps for any domain. Extract all URLs, detect sitemap indexes, and validate structure for SEO audits and web crawlers.

1โ€ข0
50 FREE API units
Code & formatting

Get an instant SEO snapshot of any URL. Returns SEO score, title, meta tags, headings, word count, load speed & key on-page signals in one API call.

4โ€ข0
50 FREE API units
Code & formatting

Audit any URL for on-page SEO issues. Extract title tags, meta descriptions, headings, internal links, image alt text & SEO health score. JSON output, free tier

1โ€ข0
50 FREE API units
Parsing & extraction

Detect and extract all schema.org structured data from any webpage โ€” JSON-LD, Microdata, RDFa. Identify Article, Product, FAQ, Review & more.

1โ€ข0
1K FREE API units
Storage & key-value

The Read Key-Value API provides a fast, cloud-based storage solution that allows users to retrieve values by specifying unique keys.

5โ€ข4
1.5K FREE API units
Code & formatting

The Image to ASCII Art by URL API converts remote images into text-based ASCII representations, making it ideal for command-line interfaces, creative projects.

2โ€ข1
1.5K FREE API units
Code & formatting

Rapidly create detailed 3D assets for games, AR & design with Trellisโ€”state-of-the-art AI for fast, production-ready results.

8โ€ข546
20 FREE API units
URL & QR utilities

Create QR codes in various formats (SVG, PNG, base64) with lightning-fast performance and custom error correction levels.

1โ€ข4
3K FREE API units
Document & PDF tools

Identity Document Verification Reference

1โ€ข10
$29/month
Code & formatting

Generate classic โ€œLoremโ€ฏipsum dolor sit ametย โ€ฆโ€ in any length with a single REST call. Free tier, simple auth, instant JSON output for dev, QA and design teams.

3โ€ข0
1K FREE API units
Code & formatting

Uncover website technologies with DNS, TLS, and HTTP analysis, featuring fast CPE identification for enhanced security insights.

2โ€ข4
100 FREE API units
Parsing & extraction

Extract contact details from any webpage โ€” emails, phone numbers, social links, address & contact forms. Ideal for lead gen and outreach.

3โ€ข0
50 FREE API units
Code & formatting

The Convert Units API provides a simple and efficient way to convert measurements across multiple unit types, including weight, length, temperature, and more.

2โ€ข1
1.5K FREE API units
Code & formatting

Save time and effort in coding: Use the Coding Assistant API for intelligent completion, highlighting, and correction tools across multiple programming language

21โ€ข1.1K
100 FREE API units
Screenshot & capture

Capture lightning-fast, pixel-perfect website screenshots, automatically blocking cookie banners and popups with WebShot API, delivering raw images or cached li

1โ€ข5
100 FREE API units
Document & PDF tools

Stop yak-shaving, generate a PDF now!

5โ€ข6
200 FREE API units
URL & QR utilities

Generate customized, scalable QR codes: Integrate our API for efficient and reliable QR code implementation.

47โ€ข23.6K
10 FREE API units
Document & PDF tools

PPT Generation using AI.

0โ€ข0
$49/month