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Calculators, converters, PDF, text, images and much more — each with its own page. Type your data and get the result right here, with no sign-up and without your data leaving your device. Need them in your own app? The same tools are available by API.

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New capabilities

Fresh in the kit — just landed.

New✅ ValidationCosta Rica ID number validatorEnter 1-0234-0567 and you learn it is a valid personal cédula, stored as 102340567 and shown in its usual hyphenated…NNitroRuns in your browserFreeOpen →New💰 Finance & moneyCosta Rica severance calculatorThirty months on an average ₡600,000, then a dismissal without just cause: the settlement comes to ₡2,040,000 in notice…NNitroRuns in your browserFreeOpen →New💰 Finance & moneyCosta Rica employer payroll charges 2026A ₡1,000,000 monthly salary costs a Costa Rican employer ₡1,268,300 in 2026, because ₡268,300 in social charges, the…NNitroRuns in your browserFreeOpen →New💰 Finance & moneyCosta Rica net salary calculator 2026On ₡1,000,000 gross a month, an employee in Costa Rica takes home ₡883,500 in 2026: ₡108,300 goes to the CCSS and ₡8,200…NNitroRuns in your browserFreeOpen →New💰 Finance & moneyCosta Rica aguinaldo calculatorYour aguinaldo is one twelfth of everything earned from 1 December to 30 November: twelve months at ₡600,000 come to an…NNitroRuns in your browserFreeOpen →New➗ MathNull space calculatorThe rows (1, 2, 3) and (2, 4, 6) have rank 1, so their null space needs two basis vectors: (−2, 1, 0) and (−3, 0, 1).SsamuraiRuns in your browserFreeOpen →New➗ MathLogical NOR calculatorFalse NOR false is true, and every other pair gives false. Enter two true-or-false values and get the NOR result with…PPavilionRuns in your browserFreeOpen →New➗ MathMultiply complex numbersMultiply two complex numbers in rectangular form: (1 + 2i)(3 + 4i) gives −5 + 10i, using (ac − bd) + (ad + bc)i with i²…AabuelaRuns in your browserFreeOpen →New➗ MathMöbius strip calculatorGive the band width and the centreline radius and get the Möbius strip's area and its single edge: a band 1 wide on a…SsamuraiRuns in your browserFreeOpen →New➗ MathLong multiplication calculatorMultiply two whole numbers the schoolbook way and see every partial product: 123 times 45 gives the rows 615 and 4920…AabuelaRuns in your browserFreeOpen →New➗ MathMean calculatorAdd up a list and divide by how many numbers it holds: 2, 4, 6, 8 and 10 sum to 30, so the mean is 6.PPavilionRuns in your browserFreeOpen →New➗ MathLog2 calculatorEnter a positive number and get its base-2 logarithm, the power of two that produces it: log2 of 8 is 3, of one half is…SsamuraiRuns in your browserFreeOpen →

Popular capabilities

Most viewed first; free tools win ties.

#1📈 SEOValidate a redirect mapCatch redirect mistakes while the map is still a file: in /a → /b → /c → /d, the route from /a takes three hops and is…GGalaRuns in your browserFreeOpen →#2📄 Documents & PDFConvert HTML to PDFTurn an invoice template or a rendered report written in HTML into a PDF that looks exactly like the page a modern…NNitroAPI$0.040Open →#3📄 Documents & PDFJPG to PDFThree photos of a damaged part, or several receipts snapped on a phone, become one PDF with one page per image, in the…NNitroAPI$0.002Open →#4📄 Documents & PDFURL to PDFKeep a competitor's advertised claims, a government notice or a partner's terms exactly as they appeared on a given…NNitroAPI$0.040Open →#5🌐 TranslationSort a list alphabeticallyWith Spanish rules, “nandu” comes before “ñandú” and “Ñoño”, and “Ángel” sits right after “angel” instead of at the end…GGalaRuns in your browserFreeOpen →#6✅ ValidationValidate a phone numberType +34 600 11 12 22 and you get +34600111222, confirmed as a valid Spanish number of 11 digits, ready for your contact…NNitroRuns in your browserFreeOpen →#7✅ ValidationColor contrast checkerKnow whether text will stay readable for everyone, whatever your own screen shows: dark gray #111827 on white has a…GGalaRuns in your browserFreeOpen →#8🖼️ ImagesAdd a logo to a QR codeAdd your logo to the center of a QR code without breaking it: the error-correction level, the logo's size and the blank…NNitroRuns in your browserFreeOpen →#9🕸️ Web Scraping & MonitoringRemove tracking parameters from a URLTwo UTM tags gone, the id parameter kept and nothing else in the link touched: paste a link to strip known tracking…GGalaRuns in your browserFreeOpen →#10📄 Documents & PDFSplit a PDFCut a three-page PDF every two pages and you get two files: pages 1 and 2, then page 3.NNitroAPI$0.002Open →#11📄 Documents & PDFExtract text from a PDFGet the words a native PDF already contains as plain text in reading order, without fonts, columns or coordinates…NNitroAPI$0.002Open →#12✍️ Text & AISummarize a textNobody on your team has to skim a 4,000-word document again to find the three sentences that matter: paste it in and get…NNitroAPI$0.003Open →

Find your tool

Search in your own words or filter by category.

✍️ Text & AIAPI
Fix punctuation
Turn a wall of words without a single comma, such as a raw voice transcript, into readable sentences with periods, commas, question marks and capitals where…
NNitro
$0.003
✍️ Text & AIAPI
Proofread
A spell checker catches 'teh'; this review also flags the dangling modifier and the sentence that runs three clauses too long.
NNitro
$0.003
✍️ Text & AIAPI
Detect language
A full paragraph in Portuguese comes back with high confidence, while a three-word fragment like ‘no problema’ gets a lower score and ranked alternatives, so a…
NNitro
$0.003
✍️ Text & AIAPI
Sentiment analysis
Send thousands of short texts and get a positive, negative or neutral label with a confidence for each one.
NNitro
$0.003
✍️ Text & AIAPI
Detect emotion in text
Name what a text actually feels: joy, anger, sadness, fear, surprise or disgust, each with its share, because real writing often mixes several.
NNitro
$0.003
✍️ Text & AIAPI
Classify intent
Send customer messages and get back what each writer is trying to do, such as ask a question, request a refund, book something, complain or cancel, with a…
NNitro
$0.003
✍️ Text & AIAPI
Classify text
Give it your own labels, such as «billing dispute», «shipping delay» and «product defect», and every text is sorted into the one or several that fit, with a…
NNitro
$0.003
✍️ Text & AIAPI
Moderate content
Every comment, review or message gets a score per category, such as hate speech, harassment and severe toxicity, before anyone else sees it.
NNitro
$0.003
✍️ Text & AIAPI
Detect spam
Send a batch of comments, contact-form fills or reviews and each one comes back with a spam likelihood and a short reason, so junk is approved, rejected or…
NNitro
$0.003
✍️ Text & AIAPI
Find personal data
A ten-digit number in a sentence about a phone is flagged as a phone number, while the same digits in an order total are not: detection reads the context.
NNitro
$0.003
✍️ Text & AIAPI
Redact personal data
Before a support ticket goes to a vendor, the customer's name becomes [NAME] and the email [EMAIL]: each personal detail is swapped for a labeled placeholder…
NNitro
$0.003
✍️ Text & AIAPI
Anonymize text
A job title, a city, an age and a rare condition can identify someone even with every name removed, so those details are rewritten too, with natural stand-ins…
NNitro
$0.003
✍️ Text & AIAPI
Extract entities
Turn a support transcript, an article or a contract into a list of the people, organizations, locations and dates it mentions, grouped by type and marked with…
NNitro
$0.003
✍️ Text & AIAPI
Extract keywords
Send an article, a product page or a transcript and get the phrases that carry its meaning, ranked by relevance, such as commercial real estate financing…
NNitro
$0.003
✍️ Text & AIAPI
Extract dates
Pull every date out of a text, from 15/03/24 to next Tuesday or the fifteenth of March, and get each one normalized to a single unambiguous format, labeled with…
NNitro
$0.003
✍️ Text & AIAPI
Extract amounts
Get every monetary figure in a text with its value, its currency and a label for what it represents, such as total, tax, discount, late fee or deposit.
NNitro
$0.003
✍️ Text & AIAPI
Extract questions
Get only the questions from a long ticket, call transcript or forum thread, including those with no question mark, such as wondering whether the refund already…
NNitro
$0.003
✍️ Text & AIAPI
Extract claims
Get the handful of statements in an argument that are actually true or false, such as a figure that rose or fell, without the opinion, framing and rhetorical…
NNitro
$0.003
✍️ Text & AIAPI
Pull quotes
Feed it a draft and get back the pull quotes a good editor would circle in pen: the sentences with the most standalone punch, ranked and quoted word for word…
NNitro
$0.003
✍️ Text & AIAPI
Extract action items
Paste minutes, a chat thread or a rambling email and get only the commitments: the task, the owner if one was named and the deadline if one was said.
NNitro
$0.003
✍️ Text & AIAPI
Text to JSON
A resume that gives the phone number in one sentence and the job title three paragraphs later comes back as one tidy record with both, in exactly the layout you…
NNitro
$0.003
✍️ Text & AIAPI
Text to table
A paragraph that lists three products, each with a price and a size, comes back as a clean Markdown table with one row per product and aligned columns, ready to…
NNitro
$0.003
✍️ Text & AIAPI
Text to bullets
A paragraph that makes five points becomes five bullets, not three: every fact, step and claim gets its own line, and only linking phrases such as «as a result»…
NNitro
$0.003
✍️ Text & AIAPI
Content outline
Send a topic, a rough draft or loose notes and get the skeleton of the piece: descriptive headings, subpoints and a short note on what each section should…
NNitro
$0.003
✍️ Text & AIAPI
Compare two texts
A liability clause that got quietly weaker is easy to miss in a wall of red and green. This reads both versions and tells you in plain words what was added…
NNitro
$0.003
✍️ Text & AIAPI
Text similarity
«The invoice is overdue» and «payment hasn't arrived yet» share almost no words but mean nearly the same, while «the report is final» and «the report is not…
NNitro
$0.002
✍️ Text & AIAPI
Generate an FAQ
Give it a product page, a shipping policy or terms of service and get the questions that text answers, each paired with a concise answer drawn from it.
NNitro
$0.003
✍️ Text & AIAPI
Generate a quiz
Turn a chapter, a training manual or an onboarding document into a quiz whose correct answers come from the text itself, so every question leads back to the…
NNitro
$0.003
✍️ Text & AIAPI
Generate flashcards
Feed it a chapter, a policy manual or lecture notes and get back question-and-answer cards sized for spaced repetition, one idea per card and each answer able…
NNitro
$0.003
✍️ Text & AIAPI
Ask your document
Instead of skimming a 60-page contract for one buried fact, ask your question and get the answer taken from the document itself, not from general knowledge.
NNitro
$0.003
✍️ Text & AIAPI
Generate text
Give it a prompt and get finished text back without watching it stream: the job is queued and the result waits for you.
NNitro
$0.003
✍️ Text & AIAPI
Write a blog post
Give a title and a short brief with the angle, audience and key points, and get a complete draft with an introduction, body sections and a close, not bullet…
NNitro
$0.003
✍️ Text & AIAPI
Product descriptions
Turn a spreadsheet of 10,000 items, with names, categories and specs, into distinct, sellable descriptions instead of blank listings or the manufacturer copy…
NNitro
$0.003
✍️ Text & AIAPI
Ad copy
Ask for five headline angles for one product and each arrives inside the character limit you set, never cut off mid-word.
NNitro
$0.003
✍️ Text & AIAPI
Landing page copy
Get a landing page written as four connected blocks, hero, benefits, objections and call to action, from your product, audience and offer.
NNitro
$0.003
✍️ Text & AIAPI
Write an email
Tell it the goal, who the email is for and the tone you want, and get back a complete email with a subject line and body that fit that register.
NNitro
$0.003
✍️ Text & AIAPI
Subject lines
Describe the email once and get several subject lines that differ in approach, not just wording: curiosity, urgency, directness or a number.
NNitro
$0.003
✍️ Text & AIAPI
Reply to an email
Give it the whole thread, not just the last message, plus the direction you want (confirm, decline, ask a follow-up or escalate), and it drafts a reply that…
NNitro
$0.003
✍️ Text & AIAPI
Support replies
Each ticket gets a reply drafted from your own help centre, so a refund question carries your real refund window and a setup question your real steps.
NNitro
$0.003
✍️ Text & AIAPI
Reply to reviews
Paste a review and get a reply to that specific complaint or praise, not a generic thank-you: a broken part gets an apology and a concrete next step, never a…
NNitro
$0.003
✍️ Text & AIAPI
Social posts
One product launch gets a distinct post for each network: a short, punchy line with room for a photo in one place, a fuller paragraph with context in another.
NNitro
$0.003
✍️ Text & AIAPI
Social thread
Instead of slicing your article every few hundred characters, the tool rebuilds it as a numbered thread around the argument's real turning points: a hook that…
NNitro
$0.003
✍️ Text & AIAPI
Generate hashtags
Paste your post and get hashtags chosen from its actual content: a mix of broader tags for reach and narrower, topic-specific ones for relevance, so it reaches…
NNitro
$0.003
✍️ Text & AIAPI
Write headlines
Paste an article, a summary or a working title and get a set of alternative headlines, each specific and true to your source, so you pick one instead of staring…
NNitro
$0.003
✍️ Text & AIAPI
A/B copy variants
Give it one ad, button label or subject line and get back versions that truly differ: one leads with a benefit, another with urgency, another with social proof…
NNitro
$0.003
✍️ Text & AIAPI
Name ideas
Describe what you are naming, a product, a coffee brand or a podcast, and get a batch of candidates to react to, built on different naming strategies rather…
NNitro
$0.003
✍️ Text & AIAPI
Slogans
Describe what your brand does and stands for, and get a batch of five-to-eight-word lines built on different moves, from rhyme and alliteration to a plain…
NNitro
$0.003
✍️ Text & AIAPI
Write a bio
A social profile wants one line and a speaker page wants three paragraphs: write your career details once and get a short, a medium and a long bio, each shaped…
NNitro
$0.003
✍️ Text & AIAPI
Cover letter
Instead of the usual three paragraphs about enthusiasm, experience and an interview request, the letter cross-checks your CV against the posting and names the…
NNitro
$0.003
✍️ Text & AIAPI
Interview questions
Name the role, the level and the skills you are hiring for, and get a question set scoped to that opening instead of the same fifty prompts every job site…
NNitro
$0.003
✍️ Text & AIAPI
Video script
Give a topic, a format and a target length, and get a written script, not an outline: a hook line built for the first three seconds, paced beats and a closing…
NNitro
$0.003
✍️ Text & AIAPI
Newsletter
Hand over the forty links you saved this week and get back a structured issue: grouped sections, short summaries and an order that reads well, instead of a flat…
NNitro
$0.003
✍️ Text & AIAPI
Changelog
Messages like ‘wip’ and ‘address review comments’ become release notes grouped into features, fixes and breaking changes, each written in plain terms for the…
NNitro
$0.003
✍️ Text & AIAPI
Content ideas
One seed, such as a product category or back-to-school, returns a month of distinct angles, each with a working title, a suggested format and a note on why it…
NNitro
$0.003
✍️ Text & AIAPI
Score leads
Out of forty overnight demo requests, find the five worth calling first: each lead's message gets a score and the reasons behind it, such as urgency, budget…
NNitro
$0.003
✍️ Text & AIAPI
Route tickets
A ticket about a failed payment goes to billing, not to an engineer's desk: the subject and body are read, then a queue, category and priority are suggested…
NNitro
$0.003
✍️ Text & AIAPI
Summarize reviews
A 4.1-star average can hide customers who love the product and hate the shipping. Feed in the reviews and get the recurring praise and complaints by theme, with…
NNitro
$0.003
✍️ Text & AIAPI
Analyze feedback
Send a batch of raw comments and get back the themes inside them, the sentiment attached to each theme and a priority ranking, so a theme mentioned rarely but…
NNitro
$0.003
✍️ Text & AIAPI
Categorize expenses
Send card or bank transactions and get each one sorted into a bucket such as travel, office supplies, software or meals, read from the merchant name, amount and…
NNitro
$0.003
✍️ Text & AIAPI
Categorize products
Instead of hand-sorting ten thousand items, send your products with your own category tree, flat or nested, and get back the category path for each one.
NNitro
$0.003

How it works

1

Get your key

Create an account with your email and add balance when you need it. No subscription, no sales call.

2

Call the endpoint

One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.

3

Collect the result

Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.

Pay only for what you use

No subscription. Free tools run in your browser; paid tasks draw from your balance, which never expires.

Free tools
$0.00

On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.

Balance
$10.00+

Top up your balance and spend it across web, API and the app. It never expires.