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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.

Explore the free tools API for developers
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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.

🔍 Semantic Search & RAGAPI
Hybrid search
One search box that handles both 'SKU-88213' and 'lightweight running jacket': exact terms keep their precision, loose descriptions are matched by meaning, and…
NNitro
$0.002
🔍 Semantic Search & RAGAPI
Rerank results
Move the right answer from position eleven to position one: send a query with the candidates your search already found, and they come back reordered by how well…
NNitro
$0.002
🔍 Semantic Search & RAGAPI
Find similar documents
Start from the contract, article or ticket you already have and get the documents closest to it in meaning: the whole document is the query, so there are no…
NNitro
$0.002
🔍 Semantic Search & RAGAPI
Reverse image search
Upload one photo and find the images in your library that resemble it, even a duplicate shot from a slightly different angle, with no captions, tags or file…
NNitro
$0.002
🔍 Semantic Search & RAGAPI
Recommend related content
Add a 'you might also like' row to fifty thousand items without anyone hand-picking: each item is compared by meaning with the candidates, so a product launched…
NNitro
$0.002
🔍 Semantic Search & RAGAPI
Cluster texts
Turn ten thousand tickets, reviews or survey answers into a short list of themes: rows that say the same thing land in the same group, and you see how large…
NNitro
$0.002
🔍 Semantic Search & RAGAPI
Detect outliers
Find the handful of rows that do not belong among ten thousand normal ones, such as a mislabeled entry, an unusual claim or a description copied from the wrong…
NNitro
$0.002
🔍 Semantic Search & RAGAPI
Match products
'Wireless Mouse Blk 2.4G' in a supplier feed and 'Black Wireless Optical Mouse' in your catalogue are the same item: this finds such pairs without a shared code…
NNitro
$0.002
🔍 Semantic Search & RAGAPI
Ask your documents
Ask what your benefits handbook says about leave and get an answer drawn only from that handbook, with the passages it used; if your documents are silent, it…
NNitro
$0.003
🔍 Semantic Search & RAGAPI
Answers with citations
Ask about a benefits rule and receive the answer plus the exact clause it came from, ready to attach to a ticket, so every claim can be checked in seconds.
NNitro
$0.003
🔍 Semantic Search & RAGAPI
Chat with a PDF
A 90-page equipment manual has the answer on page 47; ask your question and get it straight from the file, with the passage attached, instead of reading the…
NNitro
$0.003
🔍 Semantic Search & RAGAPI
Chat with a website
Ask your store's bot about returns and it answers from your real policy page, read again each time someone asks, never from an invented, more generous policy.
NNitro
$0.003
🔍 Semantic Search & RAGAPI
Build an FAQ bot
A customer asks about a password reset in their own words and gets the answer from your help article, even if they phrase it differently; questions your FAQ…
NNitro
$0.003
🔍 Semantic Search & RAGAPI
Rewrite queries
A shopper types “warm jacket cheap”; this turns it into a clearer, more searchable query before your catalog search runs, so the same search finds more relevant…
NNitro
$0.003
🔔 Notifications & FlowsTemporarily withdrawn
Send a transactional email
Get an order confirmation or a sign-in code into an inbox within seconds, sent from your own domain so your name shows instead of a stranger's, with a delivery…
NNitro
$0.002
🔔 Notifications & FlowsTemporarily withdrawn
Send email from a template
Keep one layout for every invoice, welcome or shipping email and fill in the details per message, such as a customer's name or order number 1234.
NNitro
$0.002
🔔 Notifications & FlowsTemporarily withdrawn
Email a file as attachment
Deliver the document your system made seconds ago as an attachment, not a link: an invoice PDF and a note can travel together in one message from your own…
NNitro
$0.002
🔔 Notifications & FlowsAPI
Schedule an email
Write the reminder now and let it leave at the right moment: an appointment reminder for the evening before, a trial warning three days before it ends, and a…
NNitro
$0.002
🔔 Notifications & FlowsTemporarily withdrawn
Turn an email into a webhook
Stop retyping what arrives by email: choose a mailbox such as an invoices address, and every message sent to it reaches your system as sender, subject, text and…
NNitro
$0.002
🔔 Notifications & FlowsAPI
Batch events into one daily email
Turn fifty notifications a day into one summary email: send each event as it happens, and on the schedule you choose, hourly or daily, everything arrives…
NNitro
$0.002
🔔 Notifications & FlowsAPI
Deliver webhooks reliably
Tell another system about an event and make sure it hears, even through a 500 error or a five-second timeout: each delivery is signed, retried with growing…
NNitro
$0.002
🔔 Notifications & FlowsAPI
Send a message to Slack
Put deploy results, new leads and incidents in front of the people watching a Slack channel: a build can post its status with environment and version as…
NNitro
$0.002
🔔 Notifications & FlowsAPI
Post to a Discord channel
Post release notes, alerts or status updates to a Discord channel without hosting a bot: send a plain message or a card with title, colour, fields and image…
NNitro
$0.002
🔔 Notifications & FlowsAPI
Route an alert to the right channel
One failure firing ten times in five minutes should not page ten people ten times: repeats inside the window you set fold into the first alert, and each alert…
NNitro
$0.002
🔔 Notifications & FlowsSoon
Chain tasks together
Line up tasks in order and each result feeds the next: “Hola Mundo” becomes “hola-mundo”, which the second step turns into “aG9sYS1tdW5kbw==”, all in one job.
NNitro
$0.000
🔔 Notifications & FlowsSoon
Run tasks in parallel
Independent tasks start together and finish in the time of the slowest one: “Hola Mundo” and “Otra Cosa” come back as “hola-mundo” and “otra-cosa” in one joined…
NNitro
$0.000
🔔 Notifications & FlowsSoon
Branch your workflow
The next step depends on what the last one found: when the first task returned “hola-mundo”, the condition held and only the “then” branch ran, giving…
NNitro
$0.000
🔔 Notifications & FlowsAPI
Run one task over 100,000 items
Send one task and a list, and every item comes back with its own result: “Uno Dos” and “Tres” become “uno-dos” and “tres” in a single job.
NNitro
$0.002
🔔 Notifications & FlowsAPI
Schedule a task
A task you need every night at 2am stops being a chore: give it a timetable once and each run starts by itself, with its own result and its own record.
NNitro
$0.002
🔔 Notifications & FlowsAPI
Retry failed tasks
A failed task is retried after growing waits, such as 1, 2, 4 and 8 seconds, until it works or runs out of attempts.
NNitro
$0.002

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.

Pay-as-you-go
Per task
$0.002+

The full API — 7800+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.

Balance
$10.00+

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

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