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API · /normalize-api

Unicode Normalize API

healthy 4,882 Subscribers

Normalize and fold Unicode text. Convert any string to one of the four Unicode normalization forms — NFC, NFD, NFKC, NFKD — so that visually identical text with different code-point compositions (é as one code point vs e + a combining accent) compares and stores consistently. Fold diacritics and special letters to plain ASCII (café → cafe, Straße → Strasse, Ångström → Angstrom, Łódź → Lodz) for slugs, search keys and filenames; the fi ligature and similar compatibility characters are expanded under NFKC/NFKD. And compare two strings for equality after normalization, optionally case-insensitively. Perfect for deduplication, search and indexing, username and identifier checks, and defending against look-alike (homoglyph) input. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. Distinct from Unicode character-database lookups and from text segmentation.

#unicode #normalization #diacritics #text #nfc #developer-tools
api.oanor.com/normalize-api
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Machine-readable spec so AI agents can integrate this API.

/api/normalize-api/openapi.json
/api/normalize-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
89 ms
Server probes · 24h
Subscribers
4,882
active
Total calls
88
last 7 days
status Full status page → · 12 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 660 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 660 calls/month
  • 2 req/sec
  • Normalize + fold + compare
  • No credit card
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Starter

€0.60 /month

  • 5,100 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 5.1k calls/month
  • 8 req/sec
  • All 4 normalization forms
  • Email support
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Pro

€18.00 /month

  • 120,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 120k calls/month
  • 20 req/sec
  • Dedup / search pipelines
  • Priority support
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Mega

€54.00 /month

  • 620,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 620k calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Writing Systems (ISO 15924) API

The ISO 15924 register of writing systems — the script codes used by Unicode, BCP-47 and CLDR — served from memory (no key). Every script carries its 4-letter code (e.g. Latn, Arab, Hani), numeric code, English and French names, the Unicode property value alias, the Unicode version it was added in and its date. Look a script up by code or numeric, search by code or name, or list the whole register. 226 scripts. Ideal for internationalization, locale and font tooling, BCP-47 tag validation and text-rendering pipelines.

api.oanor.com/scripts-api

Braille API

Convert text to Unicode braille and back. Uses uncontracted (Grade 1) English braille: the 26 letters, digits with the number sign, capitals with the capital sign, and common punctuation, all output as Unicode Braille Patterns (U+2800–U+28FF) so they render anywhere. The to-braille endpoint turns ordinary text into braille; the from-braille endpoint decodes braille back to text. Unknown characters pass through unchanged. Perfect for accessibility tooling and education, labels and signage mockups, braille-display previews and learning resources. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. Grade 1 only (no contractions). Distinct from cipher/alphabet encoders and from general text transforms.

api.oanor.com/braille-api

Text Segmentation API

Count and split text the way people actually read it, using Unicode-correct segmentation. The count endpoint returns the number of grapheme clusters — the real, user-perceived characters, so a family emoji counts as 1 (not 7) and an accented letter as 1 — alongside words, sentences, code points, UTF-16 code units (the naive string length that over-counts) and UTF-8 byte length. This is exactly what character-limit fields, tweet/SMS counters and validation need so the count agrees with what the user sees. The segment endpoint splits text into grapheme, word or sentence segments (word segments are flagged word-like versus punctuation and spaces) and is locale-aware, so Japanese, Chinese and Thai word boundaries come out right. Everything is computed locally with no network calls. A Unicode text segmenter — distinct from the Unicode codepoint database (unicode), the case/text-utilities toolkit (text) and string similarity (similarity). No upstream key, no cache.

api.oanor.com/segmenter-api

Unicode API

The Unicode Character Database (UCD) as an API. Resolve ANY codepoint (0..10FFFF, including the CJK and Hangul ranges) to its name, general category, block and script — plus the literal character, HTML entity (😀), CSS escape and UTF-8/UTF-16 byte sequences. Pass a hex codepoint (e.g. 1F600 → 😀 GRINNING FACE) or a literal character (?char=€). Search 40,000+ named characters by name (e.g. "heart", "arrow"), filter by category or block, and browse all 346 Unicode blocks. Ideal for text-processing tools, emoji pickers, editors, internationalization and developer utilities.

api.oanor.com/unicode-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Unicode Normalize API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Unicode Normalize API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Unicode Normalize API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Unicode Normalize API cost?
Unicode Normalize API has a free tier with 100 calls / month. Paid plans start at €0.60 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Unicode Normalize API GDPR-compliant?
All requests to Unicode Normalize API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/normalize-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/normalize-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/normalize-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/normalize-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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