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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.

🔎 OCR & Data ExtractionAPI
Get the data behind a chart
Give it a bar, line or pie chart from a report or slide and you get back the axis labels, categories, legend and an estimated value for every bar, point or…
NNitro
$0.010
🔎 OCR & Data ExtractionAPI
Screenshot to text
Copy the text trapped in a screenshot: an error dialog, a chat thread or a settings panel comes back as plain text in reading order, so a chat reads as a…
NNitro
$0.010
🔎 OCR & Data ExtractionAPI
Digitize a menu
Photograph a laminated menu and get back each dish with its description and price, grouped under starters, mains or desserts as printed.
NNitro
$0.010
🔎 OCR & Data ExtractionAPI
Check if a document is signed
Stop scrolling to the last page of every file: each page comes back saying whether a signature-like mark is there, roughly where it sits and whether it looks…
NNitro
$0.010
🔎 OCR & Data ExtractionAPI
Sort documents by type
Drop in an unnamed attachment and learn whether it is an invoice, a contract, an identity document, a bank statement, a tax form or a receipt, with a confidence…
NNitro
$0.010
🔎 OCR & Data ExtractionAPI
Any document to JSON
Name what you need, such as the invoice number and the total due, and any document comes back in exactly that structure, whatever its layout.
NNitro
$0.010
🔎 OCR & Data ExtractionAPI
Key points of a document
Find the three clauses that change the deal without reading all forty pages: you get the decisions, the figures that matter, such as amounts, dates and…
NNitro
$0.003
🔎 OCR & Data ExtractionAPI
Build a timeline from a document
Rebuild what happened, in order: an amendment dated in the appendix and an incident explained on page nine come back as one ordered list of events, each with…
NNitro
$0.003
🔎 OCR & Data ExtractionAPI
Pull citations from a paper
Upload a paper and every entry in its bibliography comes back split into authors, title, year, publication and any identifier it carries, whether written in…
NNitro
$0.003
🔎 OCR & Data ExtractionAPI
Datasheet to attributes
Get every labeled value off a supplier's datasheet, such as dimensions, electrical ratings, materials, certifications and part numbers, as attribute and value…
NNitro
$0.003
🔎 OCR & Data ExtractionAPI
Detect a document's language
Know what a file is written in before anyone opens it: a contract with an English clause and a Spanish appendix comes back with both languages, ordered by how…
NNitro
$0.003
🔎 OCR & Data ExtractionAPI
Is this PDF scanned?
Know before you pay for text recognition: each PDF comes back as native, scanned or mixed, with a page-by-page breakdown, so only the pages that are really…
NNitro
$0.002
🖼️ ImagesSoon
Resize an image
Shrink a supplier's 4000x3000 product photo to the exact box a listing card, an email banner or an avatar needs, and choose to crop, fit inside or stretch.
NNitro
$0.002
🖼️ ImagesSoon
Bulk resize images
Resize every photo of a catalog migration or a delivered shoot, sometimes hundreds, to one shared size in a single job.
NNitro
$0.002
🖼️ ImagesSoon
Make responsive images
Send one source image and get the same picture at every width your layout needs, with a ready-to-paste srcset line, so a phone never downloads a desktop-sized…
NNitro
$0.002
🖼️ ImagesSoon
Crop an image
Cut a photo to exact pixel coordinates, or to a ratio such as 1:1 or 16:9 centered for you, so the subject stays intact instead of being squeezed into the slot.
NNitro
$0.002
🖼️ ImagesSoon
Smart crop
A centred crop cuts off heads and half the product; smart crop finds where the subject actually sits and crops around it, so one photo still works as a 1:1…
NNitro
$0.002
🖼️ ImagesSoon
Make thumbnails
Send a photo with the width and height you need and get a thumbnail at exactly those dimensions, square or rectangular, so a grid of fifty listings loads…
NNitro
$0.002
🖼️ ImagesSoon
Compress an image
Shrink a JPEG or PNG so it looks the same to the eye, with the same dimensions and format, and a gallery of five hundred photos stops being the reason a page…
NNitro
$0.002
🖼️ ImagesSoon
Convert to WebP
Converting a PNG to WebP typically makes it about 30% lighter for the same image, and transparency is kept.
NNitro
$0.002
🖼️ ImagesSoon
Convert to AVIF
Send a JPEG or PNG and get back an AVIF, the format built on the AV1 video codec that beats JPEG, and often WebP, on file size at the same visual quality.
NNitro
$0.002
🖼️ ImagesSoon
Convert image format
Turn a designer's TIFF, an old tool's BMP or a camera JPG into the format your next system accepts: JPG, PNG, GIF, BMP, TIFF or WebP.
NNitro
$0.002
🖼️ ImagesSoon
HEIC to JPG
Turn an iPhone's HEIC photo into a standard JPG that opens on Windows, older Android phones, web upload forms and print labs, with the picture itself intact.
NNitro
$0.002
🖼️ ImagesAPI
SVG to PNG
Turn an SVG into a PNG drawn at exactly the size you ask for, so a 2000-pixel export looks as clean as a 200-pixel one.
NNitro
$0.040
🖼️ ImagesSoon
Rotate an image
Fix a sideways phone photo or an upside-down scan with a 90, 180 or 270 degree turn written into the pixels themselves, so it looks correct everywhere, not only…
NNitro
$0.002
🖼️ ImagesSoon
Flip an image
Mirror an image horizontally or vertically in one step: a left-facing shoe becomes its right-facing pair, and a scanned negative that came out backwards reads…
NNitro
$0.002
🖼️ ImagesSoon
Black-and-white an image
Turn any photo or scan black and white with a conversion that gives green more weight than red and blue, as the eye does, so skin tones, skies and shadows keep…
NNitro
$0.002
🖼️ ImagesSoon
Apply a filter
Give a whole batch of photos the same look: sepia for warm amber tones, blur to soften faces or noise, sharpen to make edges crisp, and several more effects.
NNitro
$0.002
🖼️ ImagesSoon
Fix brightness & contrast
A backlit product shot or a dim warehouse photo does not need a full retouch: raise the brightness to lighten every pixel evenly, and the contrast to deepen…
NNitro
$0.002
🖼️ ImagesSoon
Adjust saturation
Push colour intensity up to make a dull food photo look appetizing, or pull it down toward gray for a calmer archive image, while brightness and hue stay put: a…
NNitro
$0.002
🖼️ ImagesSoon
Add a watermark
Put your logo on a thousand photos and it lands in exactly the same relative spot on each one, portrait or landscape, at the opacity you set.
NNitro
$0.002
🖼️ ImagesSoon
Add text to an image
Stamp a price on a product photo, a headline on a banner or a Sold label on a listing, with the text baked into the pixels.
NNitro
$0.002
🖼️ ImagesSoon
Blur part of an image
Mark one or more rectangles on a photo, around a laptop screen, a whiteboard or an envelope address, and only those areas come back blurred until unreadable.
NNitro
$0.002
🖼️ ImagesSoon
Blur faces
A street photo, a crowd shot or a dashcam frame comes back with every detected face blurred beyond recognition, whatever their number or size, while the scene…
NNitro
$0.010
🖼️ ImagesSoon
Blur license plates
Driveway shots, street scenes and dashcam frames come back with every plate found blurred until its characters are unreadable, however many vehicles appear and…
NNitro
$0.010
🖼️ ImagesAPI
Compare two images
Send two images and get a score for how visually alike they are: a marketplace might treat 0.9 as a duplicate listing, while a mood board might accept anything…
NNitro
$0.002
🖼️ ImagesSoon
Generate a favicon
Upload one logo and get the whole favicon set a site needs: the 16x16 tab icon, the larger Android home-screen sizes, the Apple touch icon and an ICO file for…
NNitro
$0.002
🖼️ ImagesAPI
Open Graph images
Give every page its own link preview instead of one generic banner: send a template plus that page's title, image or price, and get back a rendered social card…
NNitro
$0.040
🖼️ ImagesSoon
Resize for social media
Send one image and get back the square post, the vertical story, the wide banner and the profile crop as a single set, with a download link valid for 24 hours.
NNitro
$0.002
🖼️ ImagesSoon
Sprite sheets
Send two or more images and get back one PNG sheet plus a map with each picture's name, position and size, so 30 small badges load as a single file instead of…
NNitro
$0.002
🖼️ ImagesAPI
Generate alt text
Send an image and get alt text ready to use: one short, accurate sentence naming the main subject, the relevant details and the context, not a stuffed keyword…
NNitro
$0.010
🖼️ ImagesAPI
Caption an image
Send a photo and get back one plain sentence about what is in it, such as “a dog running on a beach”, ready to index, filter or search.
NNitro
$0.010
🖼️ ImagesAPI
Auto-tag images
Shoppers cannot find red leather boots if nothing says red, leather or boots. Each image gets a ranked list of keywords for objects, colors, settings and…
NNitro
$0.010
🖼️ ImagesAPI
Classify images
Give your own list, such as kitchen, bathroom, exterior and living room, and each photo comes back in one of those categories with how confident the match is.
NNitro
$0.010
🖼️ ImagesAPI
Detect objects
Find every object in a photo with a box around it, its label and a confidence score: a street scene can return pedestrians, vehicles and signs in one pass.
NNitro
$0.010
🖼️ ImagesAPI
Detect NSFW content
Screen every uploaded image for adult and explicit content before anyone else sees it: each one comes back as safe, flagged or explicit, and you decide what to…
NNitro
$0.010
🖼️ ImagesAPI
Check image quality
Find out whether an upload is blurry, too dark or full of sensor noise before it reaches a listing, a profile or a print order.
NNitro
$0.010
🖼️ ImagesAPI
Image to prompt
Upload a reference picture and get a prompt covering its subject, style, lighting, color palette and composition, ready to paste into an image generator and…
NNitro
$0.010
🖼️ ImagesAPI
Text to image
Describe a picture in one sentence and get an original image back: name the subject, style, lighting and composition, and the result comes closer to what you…
NNitro
$0.002
🖼️ ImagesAPI
Image variations
Describe a banner once and get several distinct images of that same idea to compare side by side, instead of betting on a single result.
NNitro
$0.002
🖼️ ImagesAPI
Generate banners
Describe the subject and message, give the size of the slot, such as an ad unit or an email header, and get a generated banner composed to fit that frame…
NNitro
$0.002
🖼️ ImagesAPI
Product mockups
Turn one plain product photo on a white background into a mockup on a kitchen counter, a desk or an outdoor scene, with the product kept as it is rather than…
NNitro
$0.002
🖼️ ImagesSoon
Remove the background
Turn a product shot or a headshot into a clean cutout on a transparent background, with no lasso tool and no hour of zooming in on hair.
NNitro
$0.061
🖼️ ImagesSoon
Replace the background
Put pure white behind a product for a marketplace, a brand colour for a campaign, or a described scene such as a kitchen counter or a soft studio backdrop with…
NNitro
$0.062
🖼️ ImagesTemporarily withdrawn
Upscale an image
Enlarge a picture 2x or 4x so a small file fits a layout built for a bigger one. The existing pixels are spread over a larger canvas, so the result is bigger…
NNitro
$0.061
🖼️ ImagesTemporarily withdrawn
Colorize photos
Send a black-and-white photo and get a colour version where skin reads as skin tone, sky as blue and foliage as green, the way a skilled colourist would judge…
NNitro
$0.062
🖼️ ImagesSoon
Denoise an image
Clean the speckled grain from a photo shot in a dim room or at high ISO while edges, texture and fine lines stay sharp, which a plain blur cannot do.
NNitro
$0.062
🖼️ ImagesSoon
Product packshots
Turn an ordinary product photo into a marketplace-style packshot: the product is cut out of its background, centred and scaled on pure white, ready for the…
NNitro
$0.062
🖼️ ImagesSoon
Product shadow
Give a cutout product a soft shadow that follows its own contours, not a generic blurred oval, so it looks like it rests on a surface under real light.
NNitro
$0.062
🎧 Audio & VoiceAPI
Transcribe audio
Send a recording in any of more than 90 languages and get back plain text you can search, quote or translate, instead of scrubbing to minute forty for one…
NNitro
$0.004

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.